[{"from": "human", "value": "Provide a description of this molecule. [C][C@H1][Branch1][#Branch2][O][C@H1][Branch1][Ring2][S][Ring1][Branch1][C][O][N][C][=C][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N]"}, {"from": "gpt", "value": "The molecule is a monothioacetal that consists of cytosine having a (2R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl moiety attached at position 1. An inhibitor of HIV-1 reverse transcriptase, it is used as an antiviral in the treatment of AIDS and hepatitis B. It has a role as a HIV-1 reverse transcriptase inhibitor, an antiviral drug, an anti-HBV agent, an allergen, a prodrug and an EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor. It is a monothioacetal, a primary alcohol, an oxacycle and a nucleoside analogue. It is functionally related to a cytosine."}]