Biotransformation of ß-estradiol isolated from <i>Sonchus eruca</i>

Abstract

The biotransformation of ß-estradiol (1,3,5-estratriene-3,17,ß-diols) by Bacillus subtillus resulted in four metabolites which were (1) 3,5-estratriene-3-ol–17–one, (2) 1,3,5-estratriene-3,16,17-triol, (3) 1,3,5,7- estratetra-ene-3-ol-17-one and (4) 1,3,5,6, estratetra-ene-3-ol-17-one. The structures were elucidated on the basis of spectroscopic techniques. Compound 3 showed good inhibitory activity against lipoxygenase enzyme.

Key words: Microbial transformation, ß-estradiol (1,3,5-estratriene-3,17,ß-diols), Bacillus subtillus, Aspergillus niger, lipoxygenase.