The proposed structure of glaucoposterol A, a strophastane-type steroid of mushroom origin, has been synthesized from an aldol obtained in our previous synthesis of strophasterol F, a diastereomer of the proposed structure of glaucoposterol A. Based on the fact that the NMR data of natural glaucoposterol A are distinctly different from those of the synthetic material, but matches those of strophasterol F, we put forward a proposal that glaucoposterol A and strophasterol F are actually the same compound. In addition, the hitherto unknown stereochemistry of strophasterol D has been elucidated through synthesis of its two diastereomeric structures.

中文翻译：

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青铜固醇A和环丁固醇D的合成和立体化学

青霉素A的拟议结构是蘑菇来源的一种斯托伐他汀类固醇，是从我们以前合成的甾醇G的结构中的非对映异构体，苯酚甾醇F合成的醛醇中合成的。基于以下事实：天然青铜固醇A与合成材料明显不同，但与雌甾醇F相匹配，我们提出了一项建议，即古绿甾醇A和雌甾醇F实际上是同一化合物。另外，通过合成其两个非对映异构结构已经阐明了甾醇甾醇D的迄今未知的立体化学。