[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C][=Branch1][C][=O][C@H1][Branch2][Branch1][Branch1][C@][Branch2][Ring2][S][C@H1][Ring1][#Branch1][C][C@@H1][C@][C@@H1][Ring1][=Branch1][C@H1][Branch2][Ring2][C][C@@H1][Branch2][Ring1][=N][C@][Branch2][Ring1][C][C@@][Ring1][=Branch1][Branch1][N][C@H1][Branch1][Branch2][C][=Branch1][C][=O][O][Ring1][O][O][O][Branch1][Branch1][O][C][Ring1][=C][C][O][O][C][O]"}, {"from": "gpt", "value": "The molecule is a quassinoid that is 13,20-epoxypicras-3-ene substituted by hydroxy groups at positions 1, 11, 12, 14 and 15 and oxo groups at positions 2 and 16. Isolated from the ethanol extract of the stem of Brucea mollis, it exhibits cytotoxic activity. It has a role as a metabolite, an antineoplastic agent and a plant metabolite. It is a delta-lactone, a pentol, a quassinoid, an organic heteropentacyclic compound and a secondary alpha-hydroxy ketone. It derives from a hydride of a picrasane."}]