Novel flavonoid glycosides from the bulbs of Urginea indica Kunth.
Three novel flavonoid glycosides, 5,6-dimethyoxy-3',4''-dioxymethylene-7-O-(6''-beta-D-glucopyranosyl-beta-D-glucopyranosyl) flavanone (1), 5,4'-dihydroxy-3-O-alpha-L-rhamnopyranosyl-6-C-glucopyranosyl-7-O-(6''-para-coumaroyl-beta-D-glucopyranosyl) flavone (2) and 5,4'-dihydroxy-3-O-(2'''''-beta-glucopyranosyl-alpha-L-rhamnopyranosyl)-6-C-glucopyranosyl-7-O-(6''-para-coumaroyl-beta-D-glucopyranosyl) flavone (3) were isolated from the 1-butanol soluble fraction of the bulbs of the plant Urginea indica (Indian squill). The structures of the compounds were elucidated on the basis of spectral analysis, including homo- and heteronuclear correlation NMR experiments (COSY, NOESY, HSQC and HMBC) and mass spectra.
Sultana
Nasim
N
Analytical Research Division, Bangladesh Council of Scientific and Industrial Research (BCSIR) Laboratories Dhaka, Dr Qudrat-i-Khuda Road, Dhanmondi, Dhaka, Bangladesh.
Akter
Kaisarun
K
Nahar
Nilufar
N
Khan
M Shahinul Hoque
MS
Mosihuzzaman
M
M
Sohrab
Md Hossain
MH
Krohn
Karsten
K
D031448:Drimia / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*
D005419:Flavonoids; D006027:Glycosides