Four new diterpenoids wikstroemioidin A-D, together with eight known c
ompounds, isodonal, long-ikaurin D, adenolin B, effusanin A, effusanin
E, 5,3',4'-trihydroxy-6,7,8-trimethoxy flavone, ursolic acid and sito
sterol were isolated from the leaves of Isodon wikstroemioides. The st
ructures of new compounds were determined by detailed spectroscopic an
alysis and some chemical evidence.