title: [Monomeric Indole Alkaloids from Kopsia officinalis.].
abstract: Ten monomeric indole alkaloids have been identified from the roots of KOPSIA OFFICINALIS. Four of them are known: (-)-kopsinine 1, (+)-5,22-dioxokopsane 2, (-)-tetrahydroalstonine 4, and (-)-quebrachamine 3; and six are new: (-)-isoeburnamine 5 (enantiomer of the known alkaloid (+)-isoeburnamine), (-)-N-methoxycarbonyl-12-methoxykopsinaline 7, (-)-N-methoxycarbonyl-11,12-methylenedioxy kopsinaline 8, (-)-N-methoxycarbonyl-11,12-dimethoxykopsinaline 9, (-)-11,12-methylenedioxykopsinaline 10, and (-)-12-methoxykopsinaline 11.
authors.affiliation: Institut de Matière Médicale, Académie Chinoise des Sciences Médicales, Pékin, Chine.
authors.forename: X Z
authors.initials: XZ
authors.lastname: Feng
authors.forename: C
authors.initials: C
authors.lastname: Kan
authors.forename: P
authors.initials: P
authors.lastname: Potier
authors.forename: S K
authors.initials: SK
authors.lastname: Kan
authors.forename: M
authors.initials: M
authors.lastname: Lounasmaa