[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@H1][Branch1][#C][C][C][C][=Branch1][C][=C][C][Branch1][C][C][Branch1][C][C][O][C@H1][C][C][C@@][Branch2][Ring2][#Branch1][C@@][Ring1][Branch1][Branch2][Ring1][S][C][C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][C][C@@H1][C@@][Ring1][#Branch1][Branch1][=C][C][C][C@@H1][Branch1][Branch2][C][Ring1][=Branch1][Branch1][C][C][C][O][C][C][C]"}, {"from": "gpt", "value": "The molecule is a tetracyclic triterpenoid that is lanost-8-ene substituted by hydroxy groups at positions 3 and 25, a methylidene group at position 24 and an oxo group at position 7. Isolated from the whole plant of Silybum marianum, it exhibits inhibitory activity against chymotrypsin. It has a role as a metabolite and an EC 3.4.21.1 (chymotrypsin) inhibitor. It is a tetracyclic triterpenoid, a cyclic terpene ketone, a secondary alcohol and a tertiary alcohol."}]