[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch2][Ring1][=C][C][C][Branch1][Branch2][C][=Branch1][C][=O][O][Ring1][=Branch1][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C]"}, {"from": "gpt", "value": "The molecule is a butan-4-olide having a 2-(phenylsulfonyloxy)ethyl group at the 3-position and two methyl substituents at the 5-position. It is a butan-4-olide and a benzenesulfonate ester."}]