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Triterpenoids from Tripterygium wilfordii
Phytochemistry 53(2000)805~810,-0001,():
The extract (TII) of Tripterygium wilfordii Hook f. afforded four triterpenoids: wilforic acid D (3b,24-epoxy-2a-hydroxy-24R*-ethoxy-29-friedelanoic acid); (E) 3b,24-epoxy-2-oxo-3a-hydroxy-29-friedelanoic acid; (F) 2b-hydroxy-3-oxo-friedelan-29-oic acid; 29-hydroxy-3-oxo-olean-12-en-28-oic acid and 17 known triterpenoids. Their structures were established on the basis of spectroscopic studies. In a bioactivity analysis, only the known dulcioic acid compound showed a signi
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