A new pregnane steroid, named aspergillon A (1), together with two known compounds, (22E,24R)-ergosta-5,7,22-trien-3β-ol (2) and (22E, 24R)-ergosta-4,6,8(14),22-tetraen-3-one (3) were isolated from cultures of the tin mine tailings-associated fungus Aspergillus versicolor. The new structure and absolute configuration were determined with the help of extensive spectroscopic analyses and quantum chemical calculations of the electronic circular dichroism (ECD) spectra.

中文翻译：

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一种来自杂色曲霉培养物的新孕激素类固醇。

一种新的类固醇孕名为aspergillon A（1具有两个已知的化合物）一起，（22 ê，24 - [R）-ergosta-5,7,22三烯-3- β醇（2）和（22 ê，24 - [R）-ergosta-4,6,8（14），22-tetraen-3-one（3）是从锡矿尾矿相关真菌黑曲霉培养物中分离得到的。借助广泛的光谱分析和电子圆二色性（ECD）光谱的量子化学计算，确定了新的结构和绝对构型。