[{"from": "human", "value": "Please give me some details about this molecule. [C][C@H1][Branch2][Ring2][=Branch2][C][C][C][C@@H1][Branch1][C][C][C@H1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][#Branch1][C][C][C@H1][C@H1][Ring1][=Branch1][C][C][C][=C][C][=Branch1][C][=O][C][C][C@][Ring1][O][Ring1][#Branch1][C][C][C][=O]"}, {"from": "gpt", "value": "The molecule is a 3-ketocholest-4-en-26-al in which the 25-position has R-configuration."}]