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Lanostanoids of Amentotaxus formosana
Huey-Jen Su1, Shiow-Hwa Day, Sheng-Zehn Yang
1School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan 807, Republic of China.
Journal of Natural Products
|January 26, 2002
Abstract:
Three lanostanoids, 3beta-methoxycycloartan-24(24(1))-ene (1), 3beta,23beta-dimethoxycycloartan-24(24(1))-ene (2), and 3beta,23beta-dimethoxy-5alpha-lanosta-24(24(1))-ene (3), were isolated from the leaves of Amentotaxus formosana. The structures of new compounds 2 and 3 were determined by NMR and MS studies, and the structure of 3 was further confirmed by X-ray crystallographic analysis.