[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=O][O][C@@H1][C][C@H1][Branch2][Ring1][P][C][C@][C@@H1][Ring1][=Branch1][C@@][Branch2][Ring1][C][C][C][C][C][Branch1][Branch2][C@H1][Ring1][=Branch1][C@@H1][Ring1][=Branch2][O][Branch1][C][C][C][C][O][C][Ring1][#C][=O][C][=Branch1][C][=C][C][=O]"}, {"from": "gpt", "value": "The molecule is a tetracyclic diterpenoid isolated from the leaves of a Chinese medicinal herb Isodon eriocalyx and has been shown to exhibit cytotoxicity towards human tumour cells. It has a role as a metabolite and an antineoplastic agent. It is a tetracyclic diterpenoid, an acetate ester, an aldehyde, a delta-lactone and a bridged compound."}]