Chemical constituents of the leaves of Campylospermum elongatum.
The leaves of Campylospermum elongatum have furnished the cyano-glycoside (lithospermoside), nine isomeric biflavonoid derivatives among which five are I3-II6 linked (robustaflavone; 4'-O-methyl robustaflavone; 4',4″'-di-O-methyl robustaflavone; 7,4',4″-tri-O-methyl robustaflavone; 4',7″-di-O-methyl robustaflavone) and four I3-II8 linked (amentoflavone; 7-O-methyl amentoflavone; 7,7″-di-O-methyl amentoflavone; 7, 4',7″-tri-O-methyl amentoflavone) and a flavone glycoside, 4″-O-methyl-7-O-β-d-galactosylapigenin. All structures were established from a complete spectroscopic analysis (MS, IR, 1D, and 2D NMR, including HSQC, HMBC, and NOESY) as well as by comparing the obtained spectroscopic data with literature. This is the first report on the characterization of 4'-O-methyl-7-O-β-d-galactosylapigenin from the genus campylospermum and thus has important chemotaxonomic implications.
Faculty of Science, Department of Organic Chemistry, University of Yaounde I, P.O. Box 812Yaounde, Cameroon.
Savio S
SS
Elo-Manga
Faculty of Science, Department of Organic Chemistry, University of Yaounde I, P.O. Box 812Yaounde, Cameroon.
Anastasie E
AE
Tih
Faculty of Science, Department of Organic Chemistry, University of Yaounde I, P.O. Box 812Yaounde, Cameroon.
Raphael T
RT
Ghogomu
Laboratoire de Chimie de Substances Naturelles, 63 Rue Buffon, 75005 Paris, France.
Alain
A
Blond
Laboratoire de Chimie de Substances Naturelles, 63 Rue Buffon, 75005 Paris, France.
Bernard
B
Bodo
D000431:Ethanol; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D000432:Methanol; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D043842:Ochnaceae / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D012997:Solvents; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared
D047309:Flavones; D005419:Flavonoids; D012997:Solvents; D000431:Ethanol; D000432:Methanol