Quick Search

PRODUCTS

CYTOSINE

CAS Number: 71-30-7
EC Number: 200-749-5
Chemical formula: C4H5N3O
Molar mass: 111.10 g/mol

Cytosine (symbol C or Cyt) is one of the four nucleobases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). 
Cytosine is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). 

The nucleoside of cytosine is cytidine. 
In Watson-Crick base pairing, Cytosine forms three hydrogen bonds with guanine.

Cytosine (C) is one of the four nucleotide bases in DNA, with the other three being adenine (A), guanine (G) and thymine (T). 
Within a double-stranded DNA molecule, cytosine bases on one strand pair with guanine bases on the opposite strand. 
The sequence of the four nucleotide bases encodes DNA’s information.

Cytosine, a nitrogenous base derived from pyrimidine that occurs in nucleic acids, the heredity-controlling components of all living cells, and in some coenzymes, substances that act in conjunction with enzymes in chemical reactions in the body.

Cytosine is one of several types of bases that are incorporated into the nucleic acid molecule. 
Nucleic acids are composed of a five-carbon sugar bound to a phosphoric acid, along with a nitrogenous base. 

Deoxyribonucleic acid (DNA), the hereditary material of most living organisms, consists of the five-carbon sugar deoxyribose with a phosphate linkage, to which is attached cytosine or any of three other bases, which together form two complementary pairs. 
Cytosine’s complementary base in the DNA molecule is guanine.

Cytidine is a structural subunit of ribonucleic acid that consists of cytosine and the sugar ribose. 
Cytidine triphosphate (CTP), an ester of cytidine and triphosphoric acid, is the substance utilized in the cells to introduce cytidylic acid units into ribonucleic acids. 
CTP also reacts with nitrogen-containing alcohols to form coenzymes that participate in the formation of phospholipids.

Cytosine, also known as C, belongs to the class of organic compounds known as pyrimidones. 
Pyrimidones are compounds that contain a pyrimidine ring, which bears a ketone. 

Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions. 
Cytosine is also classified as a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). 

Cytosine is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). 
The nucleoside of cytosine is cytidine. 

In Watson-Crick base pairing, cytosine forms three hydrogen bonds with guanine. 
Cytosine was discovered and named by Albrecht Kossel and Albert Neumann in 1894 when Cytosine was hydrolyzed from calf thymus tissues. 

Cytosine exists in all living species, ranging from bacteria to plants to humans. 
Within cells, cytosine can undergo several enzymatic reactions. 

Cytosine can be methylated into 5-methylcytosine by an enzyme called DNA methyltransferase (DNMT) or be methylated and hydroxylated to make 5-hydroxymethylcytosine. 
The DNA methyltransferase (DNMT) family of enzymes transfer a methyl group from S-adenosyl-l-methionine (SAM) to the 5‚Äô carbon of cytosine in a molecule of DNA. 

High levels of cytosine can be found in the urine of individuals with severe combined immunodeficiency syndrome (SCID). 
Cytosine concentrations as high as (23-160 mmol/mol creatinine) were detected in SCID patients compared to normal levels of <2 mmol/mol creatinine

When learning about DNA and RNA replication, nucleotides usually represent one of the first subjects introduced on the topic. 
Cytosine constitutes one of the five nitrogenous bases (including adenine, thymine, guanine, and uracil), forming nucleic acid building blocks. 

Also known by Cytosine IUPAC name, 6-amino-1H-pyrimidine-2-one, cytosine is one of three pyrimidine bases, with thymine and uracil constituting the remaining two. 
Pyrimidine bases are smaller than their purine counterparts due to the presence of a single ring in their structures. 

By contrast, purines contain two rings. 
This difference in size allows pyrimidines to bond with purines and thus maintain a constant size throughout the double-stranded helices of DNA and RNA. 

In order to form a base pair, the basic unit of double-stranded nucleic acids, cytosine must bond with Cytosine purine counterpart, guanine. 
Aside from Cytosine role in creating nucleic acids, cytosine also possesses other significant functions within the cell.

A pyrimidine base C4H5N3O that codes genetic information in the polynucleotide chain of DNA or RNA.

Cytosine (C) is one of the four heterocyclic nitrogenous bases found in DNA (A, T, C, and G) and RNA (A, U, C, and G). 
Cytosine is a pyrimidine with two functional group substituents: an amine at the C4 position and a keto group at the C2 position. 

When cytosine is combined with ribose via a glycosidic linkage between Cytosine N1 nitrogen and the C1 position of the sugar, Cytosine forms a nucleoside called cytidine; removal of the 2′OH group of this molecule results in the formation of 2′-deoxycytidine also known as deoxycytidine. 
In Watson–Crick base pairing in nucleic acids, these derivatives form three hydrogen bonds with guanine.

Cytosine and Cytosine derivatives hydrolyze fairly rapidly under physiological conditions to give uracil via deamination, with a half-life of approximately 73 years at 37°C at pH 7. 
In biological systems this relatively rapid loss of structural genetic information is corrected by DNA repair enzymes.

Cytosine has been synthesized under simulated prebiotic conditions.

Cytosine is one of the five main nucleobases used in storing and transporting genetic information within a cell in the nucleic acids DNA and RNA. 
The other four nucleobases are adenine, guanine, thymine, and uracil. 

Cytosine, thymine, and uracil are pyrimidine derivatives, while guanine and adenine are purine derivatives. 
The nucleoside of cytosine is cytidine.

In DNA, cytosine (C) and thymine (T) form hydrogen bonds with their complementary purine derivatives, guanine (G) and adenine (A). 
In RNA, the complement of adenine is uracil (U)instead of thymine. 
Thus, cytosine, along with adenine and guanine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA and uracil only in RNA.

In Watson-Crick base pairing, cytosine forms three hydrogen bonds with guanine. 
From the point of view of structure, Cytosine is remarkable that cytosine, with Cytosine three binding sites, only attaches to guanine in DNA, while adenine, with two sites for hydrogen binding, only attaches to thymine. 
The way these hydrogen bonds hold the strands of the nucleic acid together to form the double helix, yet allowing the strands to "unzip" for replication and transcription, is simply amazing from a design point of view.

Cytosine can also be a part of a nucleotide other than related to DNA or RNA. 
As cytidine triphosphate (CTP), Cytosine can act as a co-factor to enzymes, and can transfer a phosphate to convert adenosine diphosphate (ADP) to adenosine triphosphate (ATP).

Cytosine is a pyrimidine that has a heterocyclic aromatic ring. 
In both DNA as well as RNA, Cytosine pairs with another base called guanine. 
This is called complementary base pairing.

Cytosine has an amine group at C4 and a keto group at the C2 position.

Cytosine is one of the 5 main nucleobases used in storing and transporting genetic information within a cell in the nucleic acids DNA and RNA. 
Cytosine is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). 

The nucleoside of cytosine is cytidine. 
In Watson-Crick base pairing, Cytosine forms three hydrogen bonds with guanine.

Cytosine was first discovered in 1894 when Cytosine was isolated from calf thymus tissues. 
A structure was proposed in 1903, and was synthesized (and thus confirmed) in the laboratory in the same year.

Cytosine recently found use in quantum computation. 
The first time any quantum mechanical properties were harnessed to process information took place on August 1st in 1998 when researchers at Oxford implemented David Deutsch's algorithm on a two qubit NMRQC (Nuclear Magnetic Resonance Quantum Computer) based on the cytosine molecule.

Cytosine can be found as part of DNA, RNA, or as a part of a nucleotide. 
As cytidine triphosphate (CTP), Cytosine can act as a co-factor to enzymes, and can transfer a phosphate to convert adenosine diphosphate (ADP) to adenosine triphosphate (ATP).

In DNA and RNA, cytosine is paired with guanine. 
However, Cytosine is inherently unstable, and can change into uracil (spontaneous deamination). 
This can lead to a point mutation if not repaired by the DNA repair enzymes.

Cytosine can also be methylated into 5-methylcytosine by an enzyme called DNA methyltransferase.

Organic base of the pyrimidine family. 
Cytosine was isolated from the nucleic acid of calf thymus tissue in 1894. 

A suggested structure for cytosine, published in 1903, was confirmed in the same year when that base was synthesized in the laboratory. 
Combined with the sugar ribose in glycosidic linkage, cytosine forms a derivative called cytidine (a nucleoside), which in turn can be phosphorylated with from one to three phosphoric acid groups, yielding the three nucleotides CMP (cytidine monophosphate), CDP (cytidine diphosphate), and CTP (cytidine triphosphate). 

Analogous nucleosides and nucleotides are formed from cytosine and deoxyribose. 
The nucleoside derivatives of cytosine perform important functions in cellular metabolism. 

CTP acts as a coenzyme in both carbohydrate and lipid metabolism; Cytosine can readily donate one of Cytosine phosphate groups to adenosine diphosphate (ADP) to form adenosine triphosphate (ATP), an extremely important intermediate in the transfer of chemical energy in living systems. 
CTP is the source of the cytidine found in ribonucleic acid (RNA) and deoxycytidine triphosphate (dCTP) is the source of the deoxycytidine in deoxyribonucleic acid (DNA). 
Thus cytosine is intimately involved in the preservation and transfer of genetic information.

Along with adenine, guanine, and thymine, cytosine is one of the four major bases present in DNA and RNA (uracil in RNA). 
Cytosine a pyrimidine derivative with two substituents and a heterocyclic aromatic ring (an amine group at position 4 and a keto group at position 2). 

Cytidine is the nucleoside of cytosine.
Cytosine forms three hydrogen bonds with guanine in Watson-Crick base pairing.

Biological description of Cytosine:
Nucleoside. 
Pyrimidine derivative. 

One of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). 
Cytosine reagent is used in a wide variety of research applications, as an enzyme substrate or precursor of effector molecules such as cytosine sugars.

Properties of Cytosine:
Cytosine has a chemical formula of C4H5N3O and molecular weight, or molar mass, of 111.10 g/mol. 
The calculated density for cytosine is 1.55 g/cm3. 

Cytosine has a relatively high melting point ranging from 320-325 °C. 
Cytosine is a somewhat unstable molecule and can be deaminated to form uracil. 
As a Bronsted base, cytosine can also act a hydrogen acceptor from acids.

Cytosine is a pyrimidine derivative, with a heterocyclic, aromatic ring, and two substituents attached (an amine group at position four and a keto group at position two). 
Heterocyclic compounds are organic compounds (those containing carbon) that contain a ring structure containing atoms in addition to carbon—such as sulfur, oxygen, or nitrogen—as part of the ring. 

Aromaticity is a chemical property in which a conjugated ring of unsaturated bonds, lone pairs, or empty orbitals exhibit a stabilization stronger than would be expected by the stabilization of conjugation alone. 
In organic chemistry, a substituent is an atom or group of atoms substituted in place of a hydrogen atom on the parent chain of a hydrocarbon.

In DNA and RNA, cytosine is paired with guanine. 
However, Cytosine is inherently unstable, and can change into uracil (spontaneous deamination). 
This can lead to a point mutation if not repaired by the DNA repair enzymes, such as uracil glycosylase, which cleaves a uracil in DNA.

Cytosine can also be methylated into 5-methylcytosine by an enzyme called DNA methyltransferase.

Cytosine is a pyrimidine derivative with two substituents and a heterocyclic, aromatic ring. 
Organic compounds (those containing carbon) with a ring structure containing atoms with carbon, such as sulphur, oxygen, or nitrogen, as part of the ring are known as heterocyclic compounds. 

Aromaticity is a chemical property in which the stability of a conjugated ring of unsaturated bonds, lone pairs, or empty orbitals is greater than can be predicted from conjugation alone. 
A substituent is an atom or group of atoms that is substituted for a hydrogen atom on the parent chain of a hydrocarbon in organic chemistry.

Cytosine is combined with guanine in DNA and RNA. 
Cytosine is, however, not integrally stable and can degrade into uracil. 

If the DNA repair enzymes, such as uracil glycosylase, which cleaves a uracil in DNA, do not restore Cytosine, a point mutation may occur.
An enzyme called DNA methyltransferase can also methylate cytosine into 5-methylcytosine.

Structure of Cytosine:
Cytosine is a pyrimidine containing a single heterocyclic aromatic ring, a keto group at C2, and an amine group at C4. 
The molecule is planar in shape. 

Cytosine can form three hydrogen bonds with guanine. 
Due to these three hydrogen bonds, the cytosine-guanine base pair has an overall higher boiling point and greater bond strength than the adenine-thymine base pair. 

The high melting point makes the cytosine-guanine base-pair much more resistant to denaturation. 
The double strand of DNA breaks down into Cytosine single constituent strands due to high temperatures.

Cytosine is an aminopyrimidine with the amino group at position 4 and is pyrimidin-2-one. 
Cytosine acts as a human metabolite, a metabolite in Escherichia coli, a metabolite in Saccharomyces cerevisiae, and a metabolite in mice. 

Cytosine a pyrimidine nucleobase, pyrimidone, and aminopyrimidine all rolled into one. 
The molecule has a planar shape, and in the DNA double helix, cytosine forms three hydrogen bonds with Guanine. 

In RNA, which is made up of cytosine and ribose, the nucleoside of cytosine is cytidine. 
Cytosine called deoxycytidine in DNA, and Cytosine made up of cytosine and deoxyribose. 

The deoxycytidylate nucleotide of cytosine in DNA is made up of cytosine, ribose, and phosphate. 
A heterocyclic aromatic ring, an amine group at C-4, and a keto group at C-2 make up cytosine.

Biological Function of Cytosine:
The other four primary (or canonical) nucleobases are thymine, uracil, guanine, and adenine. 
Cytosine is one of the five primary (or canonical) nucleobases. 

The genetic code is made up of these basic nucleobases. 
The genetic code for a specific protein is contained in nucleic acids such as DNA and RNA molecules, which is dependent on the sequence of nucleobases.

Nucleic acids play a crucial role in cellular functions, heredity, and organism survival. 
Cytosine, in the form of cytidine triphosphate (CTP), may be used as an enzyme co-factor. 

Cytosine can convert adenosine diphosphate (ADP) to ATP by transferring a phosphate. 
ATP is a high-energy molecule that is involved in a variety of cellular functions and essential biological reactions.

Function of Cytosine:
Cytosine is one of the five nitrogenous bases which make up the genetic code in DNA and RNA. 
Nucleic acids play an essential role in heredity, cellular function, and biological reactions. 

Cytosine can also be methylated by adding a methyl (CH3) group at the C5 position and, in this modified form, plays a vital role in epigenetics. 
Moreover, cytosine can be transformed into other bases such as uracil, further elevating the importance of this nitrogenous base in the field of epigenetics. 

Epigenetics is a relatively new field that examines the role of DNA modification in controlling gene expression in organisms. 
In Cytosine epigenetically modified form, cytosine associates with changes in the cellular and developmental process, neuron cell development, and tumor development in humans. 
When bound to three phosphate groups, cytosine forms the energy-carrying molecule cytidine triphosphate, or CTP, which can transfer phosphate groups and serve as a cofactor for enzymes.

Cytidine:
Cytidine forms when cytosine attaches to a ribose ring (ribofuranose) via a beta-N1-glycosidic bond. 
Cytidine represents the nucleoside of cytosine. 

Unlike a nucleotide, which contains a nitrogenous base, a sugar, and a phosphate group, nucleosides consist only of a base and a sugar. 
In addition to serving as an RNA component, cytidine represents a precursor for uridine, also utilized in RNA synthesis. 
Aside from Cytosine role in RNA, cytidine is also vital for glutamate cycling and glutamate/glutamine levels in the brain.

Chemical Formula of Cytosine:
C4H5N3O is the molecular formula for cytosine. 
A heterocyclic aromatic ring, an amine group at C-4, and a keto group at C-2 make up cytosine. 
Cytosine forms the nucleoside cytidine when Cytosine binds to ribose, and deoxyribose forms deoxycytidine when Cytosine binds to deoxyribose.

Tautomerization in Cytosine:
Tautomerization occurs when cytosine switches from amino to imino functionality through intermolecular proton transfer.

Chemical Activity of Cytosine:
Guanine and Cytosine bind together by non-covalent hydrogen bonding at three different sites, as seen in the picture. 
Cytosine worth noting that Watson and Crick first proposed that Guanine and Cytosine bonded by hydrogen bonding at two different sites.

Cytosine is a nucleotide component that can be found in DNA and RNA. 
Cytidine triphosphate is formed when the nucleoside cytidine binds to three phosphate groups (CTP). 

This molecule serves as a cofactor for enzymes, assisting in the conversion of phosphate from adenosine diphosphate (ADP) to adenosine triphosphate (ATP) in order to prepare ATP for use in chemical reactions.
Cytosine forms three hydrogen bonds with guanine in DNA and RNA. 

This device, however, is unstable and can transform into uracil. 
This is known as spontaneous deamination. 
If DNA repair enzymes such as uracil glycosylase do not repair the damage by cleaving uracil in DNA, a point mutation may result.

Chemical reactions of Cytosine:
Cytosine can be found as part of DNA, as part of RNA, or as a part of a nucleotide. 
As cytidine triphosphate (CTP), Cytosine can act as a co-factor to enzymes, and can transfer a phosphate to convert adenosine diphosphate (ADP) to adenosine triphosphate (ATP).

In DNA and RNA, cytosine is paired with guanine. 
However, Cytosine is inherently unstable, and can change into uracil (spontaneous deamination). 
This can lead to a point mutation if not repaired by the DNA repair enzymes such as uracil glycosylase, which cleaves a uracil in DNA.

Cytosine can also be methylated into 5-methylcytosine by an enzyme called DNA methyltransferase or be methylated and hydroxylated to make 5-hydroxymethylcytosine. 
The difference in rates of deamination of cytosine and 5-methylcytosine (to uracil and thymine) forms the basis of bisulfite sequencing.

Biological function of Cytosine:
When found third in a codon of RNA, cytosine is synonymous with uracil, as they are interchangeable as the third base. 
When found as the second base in a codon, the third is always interchangeable. 
For example, UCU, UCC, UCA and UCG are all serine, regardless of the third base.

Active enzymatic deamination of cytosine or 5-methylcytosine by the APOBEC family of cytosine deaminases could have both beneficial and detrimental implications on various cellular processes as well as on organismal evolution.
The implications of deamination on 5-hydroxymethylcytosine, on the other hand, remains less understood.

Theoretical aspects of Cytosine:
Until October 2021, Cytosine had not been found in meteorites, which suggested the first strands of RNA and DNA had to look elsewhere to obtain this building block. 
Cytosine likely formed within some meteorite parent bodies, however did not persist within these bodies due to an effective deamination reaction into uracil.

In October 2021, Cytosine was announced as having been found in meteorites by researchers in a joint Japan/NASA project, that used novel methods of detection which avoided damaging nucleotides as they were extracted from meteorites.

Application of Cytosine:
Cytosine has been used:
For the preparation of nucleobase solutions
As a standard for high-performance liquid chromatography (HPLC)
For the estimation of global methylation rate
For nucleoside 5′-triphosphate (NTP) synthesis
Purification

Uses of Cytosine:
Component of nucleic acids found throughout nature.
Used in biochemical research.

Skin conditioning    

Biochem/physiol Actions of Cytosine:
Cytosine (C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA).
Cytosine is a pyrimidine, which forms three hydrogen bonds to base pair with guanine. 
Cytosine forms a nucleotide cytidine, that is phosphorylated to cytidine 5′ monophosphate (CMP), cytidine 5′ diphosphate (CDP) and cytidine 5′ triphosphate (CTP).

Pharmacology and Biochemistry of Cytosine:

Human Metabolite Information:

Tissue Locations:
Blood
Epidermis
Fibroblasts
Intestine
Neuron
Placenta
Prostate
Skeletal Muscle
Spleen
Testis

Cellular Locations:
Extracellular

History of Cytosine:
Cytosine was discovered and named by Albrecht Kossel and Albert Neumann in 1894 when Cytosine was hydrolyzed from calf thymus tissues.
A structure was proposed in 1903, and was synthesized (and thus confirmed) in the laboratory in the same year.

In 1998, cytosine was used in an early demonstration of quantum information processing when Oxford University researchers implemented the Deutsch-Jozsa algorithm on a two qubit nuclear magnetic resonance quantum computer (NMRQC).
In March 2015, NASA scientists reported the formation of cytosine, along with uracil and thymine, from pyrimidine under the space-like laboratory conditions, which is of interest because pyrimidine has been found in meteorites although Cytosine origin is unknown.

Cytosine was first discovered in 1894 when Cytosine was isolated from calf thymus tissues. 

Cytosine recently found use in quantum computation.
The first time any quantum mechanical properties were harnessed to process information took place on August 1st, 1998, when researchers at Oxford implemented David Deutsch's algorithm on a two cubit NMRQC (Nuclear Magnetic Resonance Quantum Computer) based on the cytosine molecule.

Etymology of Cytosine:
After German Cytosin, equivalent to Ancient Greek κύτος (kútos) + -ine. 
Cytosine was discovered and named by the German biochemists Albrecht Kossel and Albert Neumann in 1894 when Cytosine was hydrolyzed from calf thymus tissues.

Identifiers of Cytosine:
CAS Number: 71-30-7
ChEBI: CHEBI:16040
ChEMBL: ChEMBL15913
ChemSpider: 577
ECHA InfoCard: 100.000.681
KEGG: C00380
MeSH: Cytosine
PubChem CID: 597
UNII: 8J337D1HZY
CompTox Dashboard (EPA): DTXSID4044456
InChI:
InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)
Key: OPTASPLRGRRNAP-UHFFFAOYSA-N check
InChI=1/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)
Key: OPTASPLRGRRNAP-UHFFFAOYAY
SMILES: O=C1Nccc(N)n1

Properties of Cytosine:
Chemical formula: C4H5N3O
Molar mass: 111.10 g/mol
Density: 1.55 g/cm3 (calculated)
Melting point: 320 to 325 °C (608 to 617 °F; 593 to 598 K) (decomposes)
Acidity (pKa): 4.45 (secondary), 12.2 (primary)[1]
Magnetic susceptibility (χ): -55.8·10−6 cm3/mo

Molecular Weight: 111.10
XLogP3: -1.7
Hydrogen Bond Donor Count: 2
Hydrogen Bond Acceptor Count: 2
Rotatable Bond Count: 0
Exact Mass: 111.043261792
Monoisotopic Mass: 111.043261792
Topological Polar Surface Area: 67.5 Ų
Heavy Atom Count: 8
Complexity: 170
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes

Names of Cytosine:

Preferred IUPAC name of Cytosine:
4-Aminopyrimidin-2(1H)-one

Other names of Cytosine:
4-Amino-1H-pyrimidine-2-one

Synonyms of Cytosine:
cytosine
71-30-7
4-Amino-2-hydroxypyrimidine
Cytosinimine
2(1H)-Pyrimidinone, 4-amino-
4-aminopyrimidin-2(1H)-one
4-Amino-2(1H)-pyrimidinone
6-Aminopyrimidin-2(1h)-One
4-aminopyrimidin-2-ol
6-amino-1H-pyrimidin-2-one
Cyt
MFCD00006034
4-Amino-1H-pyrimidin-2-one
4-amino-2-oxo-1,2-dihydropyrimidine
Cytosin
Zytosin
2(1H)-pyrimidinone, 6-amino-
AI3-52281
UNII-8J337D1HZY
CHEBI:16040
107646-83-3
8J337D1HZY
107646-84-4
134434-39-2
134434-40-5
2(1H)-Pyrimidinone, 3,4-dihydro-4-imino-, (E)- (9CI)
NSC-27787
2-Pyrimidinol, 1,4-dihydro-4-imino-, (Z)- (9CI)
2(1H)-Pyrimidinone, 3,4-dihydro-4-imino-, (Z)- (9CI)
SMR000857094
4-amino-2-pyrimidinol
EINECS 200-749-5
NSC 27787
2-Pyrimidinol, 4-amino-
aminopyrimidone
iminopyrimidinone
3h-cytosine
Cytosine (8CI)
4-amino-1,2-dihydropyrimidin-2-one
Lamivudine impurity c
287484-45-1
66460-21-7
Cytosine-[15N2]
Cytosine, >=99%
2(1H)-Pyrimidinone, 4-amino- (9CI)
Lamivudine impurity c rs
4-amino-pyrimidin-2-ol
4-Amino-2-oxypyrimidine
bmse000180
Epitope ID:167475
4-Amino-2(1H)pyrimidone
EC 200-749-5
SCHEMBL4059
4-Amino-2(1)-pyrimidone
DSSTox_CID_24456
DSSTox_RID_80242
4-Amino-2(1H)-pyrimidone
DSSTox_GSID_44456
2-Hydroxy-6-amino-pyrimidin
4-amino-3h-pyrimidin-2-one
MLS001332635
MLS001332636
CHEMBL15913
2-Pyrimidinol, 1,6-dihydro-6-imino-, (E)- (9CI)
GTPL8490
4-Aminopyrimidin-2-(1H)-one
DTXSID4044456
HMS2233N21
HMS3369N05
ZINC895210
Cytosine, >=99.0% (HPLC)
ACT01668
ALBB-021996
BCP22793
HY-I0626
NSC27787
STR01426
Tox21_302139
s4893
STK366767
STL455080
6-amino-1,2-dihydropyrimidin-2-one
AKOS000120336
AKOS005443393
AKOS015896942
AC-2489
AM83918
BCP9000005
CCG-266052
CS-W020703
MCULE-4426252594
6-amino-1H-pyrimidin-2-one;CYTOSINE
CAS-71-30-7
CID 5274263
SRI-2354-05
4-Aminopyrimidin-2(1H)-one (Cytosine)
NCGC00247019-01
NCGC00255926-01
BP-20183
Cytosine, Vetec(TM) reagent grade, 99%
NCI60_012445
SY001643
4-imino-3,4-dihydropyrimidin-2(1H)-one
DB-029615
FT-0617471
71C307
C00380
J10203
006C034
A837149
Q178425
CBA1D098-C5AB-46CE-AAC6-754572886EB2
Z256707830
Cytosine, United States Pharmacopeia (USP) Reference Standard
Cytosine, Pharmaceutical Secondary Standard; Certified Reference Material
Gemcitabine impurity A, European Pharmacopoeia (EP) Reference Standard
2(1H)-Pyrimidinone, 6-amino-
200-749-5
2637
4-amino-2-hydroxypyrimidine
4-aminopyrimidin-2(1H)-one
4-Aminopyrimidin-2-(1H)-one
6-Amino-2(1H)-pyrimidinon
6-Amino-2(1H)-pyrimidinone
6-Amino-2(1H)-pyrimidinone
6-Aminopyrimidin-2(1H)-on
6-Aminopyrimidin-2(1H)-one
71-30-7
Citosina
Cyt
Cytosin
Cytosine
Sitozin
14419-77-3
2 (1H)-Pyrimidinone, 4-amino-
2(1H)-pyrimidinone, 3,4-dihydro-4-imino-
2(1H)-Pyrimidinone, 3,4-dihydro-4-imino-, (Z)- (9CI)
2-oxy-4-amino pyrimidine
2-Pyrimidinol, 1,4-dihydro-4-imino-, (Z)- (9CI)
2-Pyrimidinol, 1,6-dihydro-6-imino-, (E)- (9CI)
2-pyrimidinol, 4-amino-
3h-cytosine
3-Iodoimidazo[1,2-a]pyrimidine
4-amino-1,2-dihydropyrimidin-2-one
4-Amino-1H-pyrimidin-2-one
4-Amino-2(1H)pyrimidone
4-amino-2-oxo-1,2-dihydropyrimidine
4-Amino-2-oxypyrimidine
4-Amino-2-pyrimidinol
4-amino-3H-pyrimidin-2-one
4-aminopyrimidin-2-ol
4-Aminouracil
4-IMINO-1H-PYRIMIDIN-2-OL
4-imino-3,4-dihydropyrimidin-2(1H)-one
6-amino-1,2-dihydropyrimidin-2-one
6-Amino-1H-pyrimidin-2-one
6-amino-3-hydropyrimidin-2-one
6-azanyl-1H-pyrimidin-2-one
6-imino-1,6-dihydropyrimidin-2-ol
CID 5274263
Cytosine|Cytosine
Cytosinimine
MFCD00082220
missing
STR01426
Zytosin

  • Share !
E-NEWSLETTER