Glycosides from Bougainvillea glabra.
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.
Simon
András
A
Institute for General and Analytical Chemistry, Budapest University of Technology and Economics, H-1521, Budapest, Hungary.
Tóth
Gábor
G
Duddeck
Helmut
H
Soliman
Hesham S M
HS
Mahmoud
Ibrahim I
II
Samir
Hanan
H
D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D039281:Nyctaginaceae / Q000737:chemistry*; D013237:Stereoisomerism
D006027:Glycosides