METHOD: A red compound named as SIPI-CANR was obtained by bio-transforming canrenone using Aspergiilus ochraceus;the purified SIPI-CANR was elucidated by spectral analysis.

• 方法：应用赭曲霉对坎利酮进行生物转化，获得一个硫酸显红色的产物SIPI-CANR。