[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is any 4-formyl steroid in which the formyl group at position 4 has beta- configuration."}, {"from": "gpt", "value": "[C][C][C][C][C][C][Ring1][Branch1][C][C][C][C][C@H1][Branch1][P][C][C][C][C][Ring1][=Branch1][Branch1][Branch2][C][Ring1][#Branch2][C][C][Ring1][P][C][C][=O]"}]