SMILES: C1=CN(C(=O)N=C1N)C[C@@H](CO)OCP(=O)(O)O
Description: The molecule is cytosine substituted at the 1 position by a 3-hydroxy-2-(phosphonomethoxy)propyl group (S configuration). A nucleoside analogue, it is an injectable antiviral used for the treatment of cytomegalovirus (CMV) retinitis in AIDS patients. It has a role as an antiviral drug, an antineoplastic agent, an anti-HIV agent and a photosensitizing agent. It is a pyrimidone and a member of phosphonic acids. It is a conjugate acid of a cidofovir(2-) and a cidofovir(1-).