A new diterpene acid with the abietane skeleton, designated as centdaroic a
cid, has been isolated besides seven other known compounds viz., alpha -atl
antone, himachlol, alpha -amyrin acetate, lawsaritol, allohimachlol, oleano
lic acid and centdarol from roots of Cedrus deodara. Characterisation and s
tructure elucidation of these compounds has been made on the basis of their
spectral analyses.