[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an ethyl ester and an organic heteropentacyclic compound."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][C][N][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=N][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2][N][=C][Ring1][=C][Ring2][Ring1][Branch1]"}]