(+/-)-Ambreinolide

(1S,4aS,8aS)-1,4,4a,5,6,7,8,8a-octahydro-2,5,5,8a-tetramethyl-1-[2'-(tert-butyldimethyl-silyloxy)ethyl]-naphthalene

cis-abienol

(1R,2R,4aS,8aS)-(+)-1-(2'-acetoxyethyl)-1,2,3,4,4a,5,6,7,8,8a-decahydro-2-hydroxy-2,5,5,8a-tetramethylnaphthalene