title: Novel flavonoid glycosides from the bulbs of Urginea indica Kunth.
abstract: 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.
authors.affiliation: Analytical Research Division, Bangladesh Council of Scientific and Industrial Research (BCSIR) Laboratories Dhaka, Dr Qudrat-i-Khuda Road, Dhanmondi, Dhaka, Bangladesh.
authors.forename: Nasim
authors.initials: N
authors.lastname: Sultana
authors.forename: Kaisarun
authors.initials: K
authors.lastname: Akter
authors.forename: Nilufar
authors.initials: N
authors.lastname: Nahar
authors.forename: M Shahinul Hoque
authors.initials: MS
authors.lastname: Khan
authors.forename: M
authors.initials: M
authors.lastname: Mosihuzzaman
authors.forename: Md Hossain
authors.initials: MH
authors.lastname: Sohrab
authors.forename: Karsten
authors.initials: K
authors.lastname: Krohn
mesh_terms: D031448:Drimia / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D006027:Glycosides