Oleanane triterpenoids with PTP1B and -glucosidase inhibitory activities from .

Eleven oleanane triterpenoids (-) including two new ones ( and ) were isolated from the roots and stems of . Their structures were established by extensive spectroscopic analysis, comparison with literature, and NMR calculations. Compounds and represent the first examples of 23-hydroxy-28--oleanane and 21-hydroxy-olean-3-one triterpenoids, respectively.