[{"from": "human", "value": "Describe this molecule. [C][C][C][C][=N][C][=Branch2][Ring2][P][=C][N][Ring1][Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][C][=C][Branch2][Ring1][N][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][O][C][C][C]"}, {"from": "gpt", "value": "The molecule is a selective inhibitor of phosphodiesterase type 5 (PDE5) and is used as therapy of erectile dysfunction. Vardenafil has not been associated with serum aminotransferase elevations nor with clinically apparent liver injury."}]