[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a N-acylpyrrolidine. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C][C][C][C][/C][=C][/C][=C][/C][=Branch1][C][=O][N][C][C][C][C][Ring1][Branch1]"}]