[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=C][N][=C][C][=C][Ring1][=Branch1][C][=C][N][C][=Branch1][C][=O][C][=Branch1][Ring2][=C][Ring1][#Branch1][N]"}, {"from": "gpt", "value": "The molecule is a type 3 pyridine phosphodiesterase inhibitor. It is used in the treatment of congestive heart failure."}]