T. Morota et al., CHEMICAL STUDIES ON THE ROOT BARK OF TRIPTERIGIUM-WILFORDII .3. SESQUITERPENE ALKALOIDS FROM TRIPTERIGIUM-WILFORDII, Phytochemistry, 39(5), 1995, pp. 1219-1222
An acetone extract of the dried root bark of Tripterigium wilfordii af
forded four sesquiterpene alkaloids, including two new compounds, name
d triptonines A and B. Their structures were established on the basis
of chemical and spectroscopic studies.