[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a gamma-lactone."}, {"from": "gpt", "value": "[C][C][C@H1][C@H1][Branch1][#Branch1][C][O][C][Ring1][Branch1][=O][C][C][=C][N][=C][N][Ring1][Branch1]"}]