title: Stemoninines from the roots of Stemona tuberosa.
abstract: Five new stemoninine-type alkaloids, bisdehydrostemoninine (1), isobisdehydrostemoninine (2), bisdehydroneostemoninine (3), and bisdehydrostemoninines A (4) and B (5), were isolated from the crude-alkaloid extract of the roots of Stemona tuberosa. Their structures were elucidated on the basis of one- and two-dimensional NMR and other spectroscopic studies. The relative configuration of 4 was determined by X-ray diffraction. Alkaloid 1 displayed significant antitussive activity in the citric acid-induced guinea pig cough model.
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu-Chong-Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People's Republic of China.
authors.forename: Li-Gen
authors.initials: LG
authors.lastname: Lin
authors.forename: Qiong-Xing
authors.initials: QX
authors.lastname: Zhong
authors.forename: Tin-Yan
authors.initials: TY
authors.lastname: Cheng
authors.forename: Chun-Ping
authors.initials: CP
authors.lastname: Tang
authors.forename: Chang-Qiang
authors.initials: CQ
authors.lastname: Ke
authors.forename: Ge
authors.initials: G
authors.lastname: Lin
authors.forename: Yang
authors.initials: Y
authors.lastname: Ye
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D000996:Antitussive Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006168:Guinea Pigs; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D023421:Models, Animal; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011759:Pyrrolidines / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D041901:Stemonaceae / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D000996:Antitussive Agents; D004365:Drugs, Chinese Herbal; D007783:Lactones; D011759:Pyrrolidines; C483261:stemonine