[{"from": "human", "value": "Generate a molecule based on this description. The molecule is any C21-steroid carrying a hydroxy substituent at position 21. It is a C21-steroid and a 21-hydroxy steroid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][Ring1][=Branch1][C][C][C][C][Ring1][#Branch2][C][C][C][Branch1][N][C][Ring1][=Branch1][C][C][C][Ring1][Branch1][C][C][O][C]"}]