structure given in first source; isolated from Tripterygium wilfordii; RN given from CAS Index Guide 1989; RN given for (2alpha,3beta,20alpha)-isomer; RN for cpd without isomeric designation not avail 6/90
Source
Chung Kuo I Hsueh Ko Hsueh Yuan Hsueh Pao 1989;11(5):322