[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C@H1][Branch2][=Branch1][C][C@@H1][Branch1][=Branch1][O][C][Ring1][=Branch1][=O][C@@H1][Branch1][C][C][C@H1][C][C@H1][Branch2][Ring2][#Branch2][C@@][Branch2][Ring2][Branch1][C@@][Ring1][Branch1][Branch2][Ring1][=C][C][C][C][=C][Ring1][=Branch1][C][C][C@@H1][C][=Branch1][Ring2][=C][Ring1][#Branch1][C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch2][Branch1][C][C][C][C][C][O][C][=Branch1][C][=O][C][O]"}, {"from": "gpt", "value": "The molecule is a tetracyclic triterpenoid that is A,B-dihomo-19-nor-4-oxalanosta-1,8,19,24-tetraen-26,22-olide substituted by an acetoxy group at position 15, a hydroxy group at position 23 and an oxo group at position 3 (the 22S, 23R stereoisomer). It is isolated from the fruiting bodies of the Vietnamese mushroom Ganoderma colossum and displays inhibitory activity towards the enzyme HIV protease. It has a role as a metabolite and a HIV protease inhibitor. It is a delta-lactone, an acetate ester, an epsilon-lactone, a tetracyclic triterpenoid and a secondary alcohol. It derives from a hydride of a lanostane."}]