title: NMR spectral assignments of three aspidofractinine alkaloids, kopsine, fruticosine and fruticosamine.
abstract: 1D and 2D NMR techniques were used to assign fully the spectra of three aspidofractinine alkaloids, kopsine (1), fruticosamine (2) and fruticosine (3), isolated from a cultivated specimen of the plant Kopsia fruticosa (Apocynaceae). The assignment of the NMR data for 1, 2 and 3 will help in the future assignments of related alkaloids.
authors.affiliation: MerLion Pharmaceuticals, 1 Science Park Road, The Capricorn 05-01, Singapore Science Park II, Singapore 117528.
authors.forename: Robert P
authors.initials: RP
authors.lastname: Glover
authors.forename: K
authors.initials: K
authors.lastname: Yoganathan
authors.forename: Mark S
authors.initials: MS
authors.lastname: Butler
mesh_terms: D000470:Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D026121:Indole Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D008968:Molecular Conformation; D012015:Reference Standards
chemical_list: D000470:Alkaloids; D026121:Indole Alkaloids; C502053:fruticosamine; C502052:fruticosine; C502051:kopsine