Abstract
Microbial transformation of (+)-epimagnolin A has been investigated using Aspergillus niger. (+)-Epimagnolin A was regioselectively oxidized at the para-methoxyl group of its veratryl group and converted to (+)-de- O-methylepimagnolin A. This metabolic product was then further oxidized at the para-position of its 3,4,5-trimethoxyphenyl group and (+)-de-4′,4″- O-dimethylepimagnolin A was yielded. The structures of the metabolic products were determined by spectroscopic methods, as well as by comparison of spectral data with those of known related compounds.
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