[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a steroid lactone."}, {"from": "gpt", "value": "[C][C@@][C][C][C][=Branch1][C][=O][C][=C][Ring1][#Branch1][C][C][C@H1][C@H1][Ring1][O][C][C][C@@][Branch2][Ring1][C][C@@H1][Ring1][=Branch1][C][C][C@][Ring1][Branch1][C][C][C][=Branch1][C][=O][O][Ring1][=Branch1][C]"}]