[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][Branch1][C][C][C][C][C][C@@][Branch1][C][C][Branch2][Ring2][Branch2][C@][Branch2][Ring2][Ring1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][=Branch2][C][C][C@H1][C@H1][Ring1][=Branch1][C][C][=C][C@@][Ring1][=Branch1][Branch1][#Branch2][C][C][C@@H1][Branch1][Ring2][C][Ring1][=Branch1][O][C][C][O][O]"}, {"from": "gpt", "value": "The molecule is an oxysterol that is cholesterol substituted by hydroxy groups at positions 17 and 20 (the 20S-stereoisomer). It is a cholestanoid, a 17alpha-hydroxy steroid, a 20-hydroxy steroid, a 3beta-hydroxy-Delta(5)-steroid, a 3beta-sterol, a C27-steroid and an oxysterol. It is functionally related to a cholesterol."}]