title: Lanostanoids of Amentotaxus formosana.
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.
authors.affiliation: School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan 807, Republic of China.
authors.forename: Huey-Jen
authors.initials: HJ
authors.lastname: Su
authors.forename: Shiow-Hwa
authors.initials: SH
authors.lastname: Day
authors.forename: Sheng-Zehn
authors.initials: SZ
authors.lastname: Yang
authors.forename: Michael Y
authors.initials: MY
authors.lastname: Chiang
authors.forename: Chun-Nan
authors.initials: CN
authors.lastname: Lin
mesh_terms: D018360:Crystallography, X-Ray; D007810:Lanosterol / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013624:Taiwan
chemical_list: C449851:3beta,23beta-dimethoxy-5alpha-lanosta-24(24(1))-ene; C449850:3beta,23beta-dimethoxycycloartan-24(24(1))-ene; C449849:3beta-methoxycycloartan-24(24(1))-ene; D007810:Lanosterol