[{"from": "human", "value": "Describe this molecule. [C][C@][C][C][C@H1][C@H1][Branch1][N][C@@H1][Ring1][=Branch1][C][C][C@@H1][Ring1][=Branch2][C][C][=O][C][C][C][C@@][Ring1][=N][Branch1][#Branch1][C][C][C][C][Ring1][=Branch1][C]"}, {"from": "gpt", "value": "The molecule is a 21-oxo steroid, a C21-steroid and a steroid aldehyde. It derives from a hydride of a pregnane."}]