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Journal Article
Research Support, Non-U.S. Gov't
Biotransformation of ursolic acid by Syncephalastrum racemosum CGMCC 3.2500 and anti-HCV activity.
Fitoterapia 2013 April
Microbial transformation of ursolic acid (UA, 3β-hydroxy-urs-12-en-28-oic acid, 1) by filamentous fungus Syncephalastrum racemosum CGMCC 3.2500 was conducted. Five metabolites 3β, 7β, 21β-trihydroxy-urs-12-en-28-oic acid (2); 3β, 21β-dihydroxy-urs-11-en-28-oic acid-13-lactone (3); 1β, 3β, 21β-trihydroxy-urs-12-en-28-oic acid (4); 3β, 7β, 21β-trihydroxy-urs-1-en-28-oic acid-13-lactone (5); and 21-oxo-1β, 3β-dihydroxy-urs-12-en-28-oic acid (6) were afforded. Elucidation of the structures of these metabolites was primarily based on 1D and 2D NMR and HR-MS data. Metabolite 2 was a new compound. In addition, the anti-HCV activity of compounds 1-6 was evaluated.
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