title: Acylated and non-acylated flavonol monoglycosides from the Indian minor spice Nagkesar (Mammea longifolia).
abstract: A methanol extract of nagkesar (buds of Mammea longifolia), which showed strong radical scavenging activity, yielded 13 compounds by separations using column chromatography and HPLC. Structure elucidation of these compounds was achieved by (1)H and (13)C NMR, including DQF-COSY, TOCSY, DEPT, HMQC, HSQC, and HMBC. They include two new compounds, quercetin 3-O-(2' ',4' 'di-E-p-coumaroyl)-alpha-L-rhamno-pyranoside and quercetin 3-O-(3' ',4' '-di-E-p-coumaroyl)-alpha-L-rhamnopyranoside, along with known compounds kaempferol, quercetin, the isopropylidenedioxy derivative of shikimic acid, kaempferol 3-O-(2' ',4' '-di-E-p-coumaroyl)-alpha-L-rhamnopyranoside, kaempferol 3-O-(3' ',4' '-di-E-p-coumaroyl)-alpha-L-rhamnopyranoside, kaempferol 3-O-alpha-L-rhamnopyranoside, quercetin 3-O-alpha-L-rhamnopyranoside, shikimic acid, kaempferol 3-O-beta-D-glucopyranoside, quercetin 3-O-beta-D-glucopyranoside, and beta-sitosterol 3-O-beta-D-glucopyranoside.
authors: National Food Research Institute, 2-1-12, Kannondai, Tsukuba, Ibaraki 305-8642, Japan. ljnatpro@yahoo.com
authors: Lingamallu
authors: L
authors: Jagan Mohan Rao
authors: Hiroshi
authors: H
authors: Yada
authors: Hiroshi
authors: H
authors: Ono
authors: Mitsuru
authors: M
authors: Yoshida
mesh_terms: D000215:Acylation; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis*; D044948:Flavonols; D016166:Free Radical Scavengers; D009682:Magnetic Resonance Spectroscopy; D029581:Malpighiaceae / Q000737:chemistry*; D000432:Methanol; D010936:Plant Extracts / Q000032:analysis*; D011794:Quercetin / Q000032:analysis / Q000737:chemistry; D012765:Shikimic Acid / Q000032:analysis / Q000737:chemistry; D017365:Spices / Q000032:analysis*
chemical_list: D005419:Flavonoids; D044948:Flavonols; D016166:Free Radical Scavengers; D010936:Plant Extracts; D012765:Shikimic Acid; D011794:Quercetin; D000432:Methanol