title: Kopsiyunnanines F and isocondylocarpines: new tubotaiwine-type alkaloids from Yunnan Kopsia arborea.
abstract: Five new alkaloids, including three 19,20-epoxytubotaiwine stereoisomers, viz. kopsiyunnanines F1 (1), F2 (2), and F3 (3), (Z)-isocondylocarpine (4), and (Z)-isocondylocarpine N-oxide (5), along with five known tubotaiwine-type indole alkaloids were isolated from the aerial part of Yunnan Kopsia arborea Blume (Apocynaceae). Their structures including absolute configurations were elucidated by spectroscopic and chemical means.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
authors.forename: Yuqiu
authors.initials: Y
authors.lastname: Wu
authors.forename: Mariko
authors.initials: M
authors.lastname: Kitajima
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Kogure
authors.forename: Yunsong
authors.initials: Y
authors.lastname: Wang
authors.forename: Rongping
authors.initials: R
authors.lastname: Zhang
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Takayama
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D029062:Apocynaceae / Q000737:chemistry*; D002681:China; D026121:Indole Alkaloids / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D035261:Plant Components, Aerial / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D026121:Indole Alkaloids; D010936:Plant Extracts; C404563:tubotaiwine