[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][C][C][Branch1][C][C][N][C][=Branch1][C][=O][C@@H1][C][N][Branch2][Ring2][=C][C][C][N][Ring1][=Branch1][C][C@H1][Branch2][Ring2][Ring1][C][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][C@@H1][C@@H1][Branch1][N][C][C][=C][C][=C][C][=C][Ring1][=Branch2][Ring1][=Branch1][O][O][C][C][=C][N][=C][C][=C][Ring1][=Branch1].[O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a synthetic antiviral agent. Indinavir selectively binds to the active site of human immunodeficiency virus (HIV) protease and inhibits its activity, preventing the protease-mediated cleavage of gag-pol viral polyproteins; as a result immature, noninfectious virions are produced."}]