[{"from": "human", "value": "Describe this molecule. [C][C@@][C][C][C][C][Branch2][Ring1][=Branch2][C@H1][Ring1][=Branch1][C][C][C@][C@H1][Ring1][#Branch2][C][C][C@H1][Branch1][Ring2][C][Ring1][=Branch1][C][=Branch1][C][=C][C][Ring1][=Branch2][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a tetracyclic diterpene consisting of ent-kaurane, where the 6-methyl group is replaced by methylene. It derives from a hydride of an ent-kaurane."}]