[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a member of oxanes and a butyrate ester. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C][C][C][=Branch1][C][=O][O][C@@][Branch2][Ring2][O][C][C][C@@H1][Branch2][Ring2][Ring1][C][=Branch1][C][=C][C][C@@H1][C@@H1][C@H1][Branch1][#Branch1][C@H1][Ring1][O][O][Ring1][Branch1][C@@H1][C][C@H1][Branch1][Branch2][C@][Ring1][Branch2][Branch1][C][C][O][O][C][C@@H1][Ring1][=Branch2][C][O][O][C]"}]