Glucopyranoside quercetin

Quercetin-3-(6-o-(6-deoxy-a-1-mannopyranosyl)-P-d-glucopyranoside). See Rutin Quercetine. See Quercetin Quercetin rhamnoglucoside Quercetin-3-rhamnoglucosine Quercetin-3-(6-o-a-1 -rhamnopyranosyl-P-d-glucopyranoside Quercetin-3-rutinoside. See Rutin Quercetol Quercitin. See Quercetin Quercus occidentalis. See Cork, oak Quercus robur. See English oak (Quercus robur) wood... 

CAS 153-18-4 EINECS/ELINCS 205-814-1 Synonyms 4H-1-Benzopyran-4-one, 3-[[6-0-(6-deoxy-a-L-mannopyranosyl)-P-D-glucopyranosyl]oxy]-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy- Bioflavonoid Cl 75730 Myriticalorin Oxyritin 3,3, 4, 5,7-Pentahydroxyflavone-3-(o-rhamnosylglucoside) 3,3, 4, 5,7-Pentahydroxyflavone-3-rutinoside Quercetin-3-(6-o-(6-deoxy-a-1-mannopyranosyl)-P-d-glucopyranoside) Quercetin rhamnoglucoside Querceti n-3-rham nogi ucosi ne... 

Quercetin-3-(6-o-a-1-rhamnopyranosyl-p-d-glucopyranoside Quercetin-3-rutinoside Rutinic acid Rutoside Vitamin P... 

Quercetin-7-O-P-D-gIucopyranoside, quercetin-7-O-P-D-sophoroside, quercetin-3-0-P-D-apiofuranosyI-(l -> 2)-P-D-galactopyranoside, quercetin-3-0-P-D-apiofuranosyl-(l 2)-P-D-galactopyranosyl-7-0-P-D-glucopyranoside, quercetin-3-0-a-L-rhamnopyranosyl-(l 6)-P-D-galactopyranosyl-7-O-P -D-sophoroside, quercetin-3-0-P-D-galactopyranosyl-7-O-P-D-glucopyranoside... 

An extract from Lactuca indica showed significant free radical scavenging activity, and protected phixl74 supercoiled DNA against strand cleavage and reduced oxidative stress in human promyelocytic leukemia HL-60 cells. On account of protocatechulic acid, methyl p-hydroxybenzoate, caffeic acid, 3,5-dicaffeoylquinic acid, luteolin 7-O-fT glucopyranoside, and quercetin 3-0-(3-g 1 ucopyranoside are the major antioxidative constituents (111). 

Weckerle, B. et ah. Quercetin 3,3, 4 -tri-0-p-D-glucopyranosides from leaves of Eruca sativa (Mill.), Phytochemistry, 57, 547, 2001. 

Licania pittieri Prance is a tree up to 15 meters high growing in the cloud forests at 1800 m in altitude. From the methanol extract of the leaves, collected in the Parque Nacional Henry Pittieri, oleanolic acid (1), ursolic acid (2), catechin (3), epicatechin (4), quercetin (5), and four glycosidic derivatives, quercetin 3-O-P-D-galactopyranoside (6), quercetin 3-O-P-D-glucopyranoside (7), quercetin 3-O-a-L-rhamnopyranoside (8), and quercetin 3-O-a-L-arabinopyranoside (9) were identified directly by comparing their spectroscopic data with those reported in the literature and/or authentic samples [see Fig. (1)] [5]. 

Other derivatives of quercetin had earlier been implicated as inhibitors of pollen germination208 rutin [ quercetin 3-(6-O-0-L-rhamnopyranosyl)-d-glucopyranoside], and quercetrin (3-0-j3-L-rhamnopyranosylquercetin). Naringenin, (13), isolated as a glycoside from peach buds, inhibited... 

Our investigation on Malaysian H. diffusa [31] as well as H. her-bacea also yielded quercetin 3-0-glucopyranoside (21) together with quercetin 3-0-rutinoside (24). From H. herbacea, we have found kaempferol 3-O-rutinoside (25), kaempferol 3-O-glucoside (26), kaempferol 3-O-arabinopyranoside (27) and quercetin 3-0-galactoside (28) [7]. We have also reported kaempferitrin (29) from H. verticillata [32] and isovitexin (30) from the aerial parts of H. dichotoma [33]. 

In our own study on H. diffusa using chemical-based assays such as the ferric thiocyanate (FTC), thiobarbituric acid (TBA), and diphenylpicrylhydrazyl (DPPH) radical-scavenging methods [31], we found that both quercetin 3-0-/ -glucopyranoside (21) and quercetin 3-O- -rutinoside (22) inhibited linoleic acid peroxidation and also exhibited good DPPH radical-scavenging properties (87-88%) which was comparable to vitamin C (93%). We also found asperuloside to be inactive in both assays. 

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