[{"from": "human", "value": "What can you tell me about this molecule? [C][C][O][C][C][C][C][=Branch1][C][=O][O][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a butan-4-olide that is gamma-butyrolactone substituted by an ethoxy group at position 5. It has a role as a metabolite. It is functionally related to a gamma-butyrolactone."}]