[{"from": "human", "value": "Describe this molecule. [C][/C][=C][\\C][C][/C][=Branch1][Branch2][=C][/O][C][=Branch1][C][=O][C][/C@@H1][C@H1][Branch1][N][C@H1][Branch1][Ring2][C][/-Ring1][=C][O][C][Ring1][=Branch1][=O][C@@H1][Branch1][C][C][C][C][C][=C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a diterpenoid isolated from the brown alga Dilophus ligulatus and has been shown to exhibit cytotoxic activity. It has a role as a metabolite and an antineoplastic agent. It is a diterpenoid, a gamma-lactone, a bridged compound and an acetate ester."}]