[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch1][C][=O][C@H1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][#Branch1][C][C][=C][C@H1][Ring1][=Branch1][C][C][C][=C][C][=Branch1][C][=O][C][C][C@@][Ring1][#Branch1][Ring1][O][C][C]"}, {"from": "gpt", "value": "The molecule is a 20-oxo steroid, a C21-steroid and a 3-oxo-Delta(4) steroid. It derives from a hydride of a pregnane."}]