[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a cembrane diterpenoid with cytotoxic activity isolated from the soft coral Lobophytum michaelae. It has a role as an antineoplastic agent and a coral metabolite. It is a gamma-lactone, an acetate ester, a cembrane diterpenoid, an epoxide and a macrocycle."}, {"from": "gpt", "value": "[C][/C][=C][\\C][C@H1][Branch2][Ring2][S][C@][Branch2][Ring2][O][C@@H1][Branch1][Ring2][O][Ring1][Ring1][C@@H1][C@@H1][Branch2][Ring1][Ring2][C@@H1][Branch1][O][C][/C][=Branch1][=Branch1][=C][/C][C][/-Ring1][#C][/C][O][C][=Branch1][C][=O][C][C][=Branch1][C][=C][C][=Branch1][C][=O][O][Ring2][Ring1][C][C][O][C][=Branch1][C][=O][C]"}]