title: (-)-delta-N-normethylskytanthine from Tecoma arequipensis.
abstract: Bark of Tecoma arequipensis yielded the major alkaloidal component (-)-delta-N-normethylskytanthine whose structure was proven by X-ray diffraction analysis of the N-thiourea derivative. The stereochemistry of 1 at all four centers was enantiomeric with that of skytanthine previously reported from Tecoma stans and Skytanthus acutus. Gc-ms of the crude base fraction indicated the presence of several related alkaloids as very minor constituents.
authors.affiliation: Department of Chemistry, Colorado State University, Fort Collins 80523.
authors.forename: G H
authors.initials: GH
authors.lastname: Harris
authors.forename: E C
authors.initials: EC
authors.lastname: Fixman
authors.forename: F R
authors.initials: FR
authors.lastname: Stermitz
authors.forename: L
authors.initials: L
authors.lastname: Castedo
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D008401:Gas Chromatography-Mass Spectrometry; D008958:Models, Molecular; D010568:Peru; D010936:Plant Extracts / Q000032:analysis; D010946:Plants, Medicinal / Q000032:analysis*; D013237:Stereoisomerism; D014197:Trees / Q000032:analysis; D014961:X-Ray Diffraction
chemical_list: D000470:Alkaloids; D010936:Plant Extracts; C056671:N-normethylskytanthine