[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=N][C][=Branch2][Ring1][O][=C][C][=Branch1][Ring2][=N][Ring1][=Branch1][N][Branch1][Branch1][C][=N][Ring1][=Branch1][C][C][O][C][P][=Branch1][C][=O][Branch1][C][O][O][N]"}, {"from": "gpt", "value": "The molecule is a member of the class of phosphonic acids that is methylphosphonic acid in which one of the methyl hydrogens has been replaced by a 2-(6-amino-9H-purin-9-yl)ethoxy group. An inhibitor of HIV-1 reverse transcriptase, the bis(t-butoxycarbonyloxymethyl) ester (dipivoxil ester) prodrug is used to treat chronic hepatitis B viral infection. It has a role as a HIV-1 reverse transcriptase inhibitor, a drug metabolite, an antiviral drug, a nephrotoxic agent and a DNA synthesis inhibitor. It is a member of 6-aminopurines, an ether and a member of phosphonic acids. It is functionally related to an adenine. It is a conjugate acid of an adefovir(1-)."}]