Fei-xia Huang, Wen-zhi Yang, Fei Ye, Jin-ying Tian, Hong-bo Hu, Lin-min Feng, De-an Guo, Min Ye
Phytochemistry 2012 OctBiotransformation of ursolic acid by the filamentous fungus Syncephalastrum racemosum (Cohn) Schroter AS 3.264 yielded five metabolites. Their structures were identified as 3β,21β-dihydroxy-urs-11-en-28-oic acid-13-lactone, 3β,7β,21β-trihydroxy-urs-11-en-28-oic acid-13-lactone, 1β,3β-dihydroxy-urs-12-en-21-one-28-oic acid, 1β,3β,21β-trihydroxy-urs-12-en-28-oic acid and 11,26-epoxy-3β,21β-dihydroxy-urs-12-en-28-oic acid based on NMR and MS spectroscopic analyses. The condensation reactions to form 28-oic acid-13-lactone ring and 11,26-epoxy ring are not frequently seen for the biotransformation of triterpenoids. One compound showed moderate inhibitory activity against protein tyrosine phosphatase 1B (PTP1B). Copyright © 2012 Elsevier Ltd. All rights reserved.
Fei-xia Huang, Wen-zhi Yang, Fei Ye, Jin-ying Tian, Hong-bo Hu, Lin-min Feng, De-an Guo, Min Ye. Microbial transformation of ursolic acid by Syncephalastrum racemosum (Cohn) Schroter AS 3.264. Phytochemistry. 2012 Oct;82:56-60
PMID: 22800913
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