[{"from": "human", "value": "Describe this molecule. [C][C@H1][C@H1][C][C][C@H1][C@][Branch1][O][C@@H1][Ring1][=Branch1][C][C][=C][Ring1][#Branch2][C][=C][Branch1][=C][C][C][=Branch1][C][=O][C][C][Ring1][=N][Branch1][C][C][C][C]"}, {"from": "gpt", "value": "The molecule is a diterpenoid that is ent-cassa-12,15-diene in which the methylene hydrogens at position 2 have been replaced by a keto group. It has a role as a plant metabolite. It is a diterpenoid and a cyclic terpene ketone. It derives from a hydride of an ent-cassa-12,15-diene."}]