cytosine 111.043 111.10212 4-amino-2(1H)-pyrimidinone 4-amino-2-hydroxypyrimidine 4-aminopyrimidin-2(1H)-one An aminopyrimidine that is pyrimidin-2-one having the amino group located at position 4. Beilstein:2637 C C4H5N3O CAS:71-30-7 CHEBI:14066 CHEBI:16040 CHEBI:23531 CHEBI:4072 CHEBI:41732 Cyt Cytosin Cytosine Gmelin:82472 HMDB:HMDB0000630 InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8) KEGG:C00380 KNApSAcK:C00001498 MetaCyc:CYTOSINE Nc1cc[nH]c(=O)n1 OPTASPLRGRRNAP-UHFFFAOYSA-N PDBeChem:CYT PMID:14253484 PMID:22770225 PMID:7877593 Reaxys:2637 Wikipedia:Cytosine Zytosin chebi_ontology cytosine pyrimidine nucleobase pyrimidone aminopyrimidine