Structure of Rabdonervosin A / 中草药

篈 new diterpene,rabdonervosin A(I ) was isolated from an ethanolic extract of the leaves and stems ofRabdosia nervosa co1lected in Jiangxi,China. Its structure was established as 1Q, 69, 15Attihydroxy-6, 7-B-sec-oent-kaur-16-en-6, 20-epoxy-7, 20-8-olide on basis of spectroscopic data.

Pentacyclic Triterpenoids from Rounduingfruit Cyclocarya(Cycocarya paliarus) / 中草药

Three pentacyclic triterpenoids were isolated from the leaves of Cyclocarya paliarus Iljinsk. On the basis of chemical evidences and spectral data, they were identified as: 2?-hydroxyursolic acid (Ⅰ), 3-oxo-2?，23-dihydroxyolean-12-en-28-oic acid (Ⅱ)and arjunolic acid (Ⅲ). Ⅱis a new compound,named cyclocaric acid B. I and Ⅲ were obtained from this plant for the first time