Abstract

One steroidal constituent, daturasterol, and a tricyclic diterpene, daturabietatriene, have been isolated for the first time from the steam bark of Datura metrel Linn, along with b-sitosterol and atropine. The structures of the new compounds have been elucidated as 24b-methylcholest-4-ene-22-one-3a-o1 and 15, 18-dihydroxyabietatrienc, respectively, on the basis of the spectral data analyses and chemical ractions.