title: [An iso-Homoprotoberberin-Alkaloid from the Roots of Berberis actinacantha.].
abstract: An alkaloid of the molecular formula C (21)H (19)NO (6) was isolated from the roots of berberis actinacantha. Substructures were derived from proton and carbon-13-NMR data. Single-crystal x-ray diffractometry identified the alkaloid as 15( R,S)-3,4-dimethoxy-11,12-methylenedioxy-8,14-dioxo-hexahydro- ISO-homoprotoberberin. ORTEP plots, bond angles, assigned carbon-13 and proton NMR data are given.
authors.affiliation: Institut für Organische Chemie der Universität Bonn, Federal Republic of Germany.
authors.forename: S
authors.initials: S
authors.lastname: Sepulveda-Boza
authors.forename: E
authors.initials: E
authors.lastname: Friedrichs
authors.forename: H
authors.initials: H
authors.lastname: Puff
authors.forename: E
authors.initials: E
authors.lastname: Breitmaier