title: Glycosides from Bougainvillea glabra.
abstract: Three glycosides were isolated from Bougainvillea glabra and their structures were determined by extensive use of 1D and 2D NMR spectroscopy ((1)H and (13)C). First compound was identical to momordin IIc (quinoside D) [beta-D-glucopyranosyl 3-O-[beta-D-xylopyranosyl-(1 --> 3)-O-(beta-D-glucopyranosyluronic acid)] oleanolate], second compound was quercetin 3-O-alpha-L-(rhamnopyranosyl)(1 --> 6)-[alpha-L-rhamnopy-ranosyl(1 --> 2)]-beta-D-galactopyranoside and third compound was its derivative quercetin 3-O-alpha-L-(4-caffeoylrhamnopyranosyl)(1 --> 6)-[alpha-L-rhamnopyranosyl (1 --> 2)]-beta-D-galactopyranoside, a new natural product.
authors.affiliation: Institute for General and Analytical Chemistry, Budapest University of Technology and Economics, H-1521, Budapest, Hungary.
authors.forename: András
authors.initials: A
authors.lastname: Simon
authors.forename: Gábor
authors.initials: G
authors.lastname: Tóth
authors.forename: Helmut
authors.initials: H
authors.lastname: Duddeck
authors.forename: Hesham S M
authors.initials: HS
authors.lastname: Soliman
authors.forename: Ibrahim I
authors.initials: II
authors.lastname: Mahmoud
authors.forename: Hanan
authors.initials: H
authors.lastname: Samir
mesh_terms: D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D039281:Nyctaginaceae / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D006027:Glycosides