Metabolism of 7-O-methylnaringenin (sakuranetin) by Cunninghamella elegans NRRL 1392 yielded naringenin and naringenin-4′-sulfate. C. elegans also converted 5, 3′, 4′-trihydroxy-7-methoxyflavanone into eriodictyol-4′-sulfate. Furthermore, incubation of 5, 4′-dihydroxy-7, 3′-dimethoxyflavanone with the same fungus gave homoeriodictyol (5, 7, 4′-trihydroxy-3′-methoxyflavanone) and homoeriodicytol-7-sulfate. The structures of the new metabolites were established by spectral analysis including 2D-NMR, HR-ESI-FT-MS beside hydrolysis by acid.
Cunninghamella elegans NRRL 1392对7-O-甲基
柚皮素(
樱草素)的代谢作用产生了
柚皮素和
柚皮素-4′-
硫酸盐。C. elegans还将5, 3′, 4′-三羟基-7-甲氧基
黄烷酮转化为异
黄酮-4′-
硫酸盐。此外,将5, 4′-二羟基-7, 3′-二甲氧基
黄烷酮与同一种真菌一起培养,可得到同型异
黄酮(5, 7, 4′-三羟基-3′-甲氧基
黄烷酮)和同型异
黄酮-7-
硫酸盐。通过包括二维核磁共振、高分辨质谱-飞行时间质谱在内的光谱分析和酸
水解,确定了新代谢产物的结构。