title: Aporphine alkaloids from the roots of Stephania viridiflavens.
abstract: Further investigation on the phytochemistry of the medicinal plant Stephania viridiflavens led to the isolation of a new naturally occurring aporphine alkaloid, (+)-6R, 6aS-isocorydine N(beta)-oxide (1), together with three known aporphine alkaloids: (+)-6R, 6aS-corydine N(beta)-oxide (2), (+)-N-methyl-laurotetanine (3) and (+)-stepharine (4). The structure and stereochemistry of 1 were determined on the basis of spectroscopic methods and confirmed by synthesis. Alkaloids 2-4 were isolated for the first time from this species.
authors.affiliation: The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, P.R. China.
authors.forename: Maosheng
authors.initials: M
authors.lastname: Zhang
authors.forename: Guangyi
authors.initials: G
authors.lastname: Liang
authors.forename: Jianping
authors.initials: J
authors.lastname: Yu
authors.forename: Weidong
authors.initials: W
authors.lastname: Pan
mesh_terms: D001060:Aporphines / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D013057:Spectrum Analysis; D031607:Stephania / Q000737:chemistry*
chemical_list: D001060:Aporphines; D010936:Plant Extracts