A new methylene quinone diterpene, buddlejone, was isolated from the r
oots of Buddleja albiflora and the roots of B. globosa Lam. The struct
ure of the compound was established by spectroscopic means as 7-hydrox
y-7,9,12-abietrien-14-one. This is the first reported diterpene to be
isolated from the Buddlejaceae.