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Isorhamnetin glycosides

A detailed study of the flavonoid chemistry of the island endemics, the closely related G. tinctoria, and live additional species from the mainland provided additional evidence pointing toward G. tinctoria as the ancestral species (Pacheco et al., 1993). The flavonoid profiles of all species consisted of flavonol glycosides as major components with an unidentified flavone glycoside and several unidentified phenolic compounds (presumably not flavonoids). The pattern of distribution of the flavonol glycosides and unidentified flavones within the set of nine species proved to be extremely informative. (The phenols were ubiquitous and are not considered further.) Kaempferol glycosides were seen in neither the island species nor G. tinctoria, but were present, in several combinations, in the rest of the mainland taxa. The isorhamnetin glycosides showed the reverse pattern, with one exception the island endemics and G. tinctoria exhibited these compounds, whereas four of the other mainland species did not. The sole exception is G. boliviari, which exhibited one of the isorhamnetin derivatives. [Pg.268]

Schieber, A., Detection of isorhamnetin glycosides in extracts of apples (Malus domestica cv. Brettacher ) by HPLC-PDA and HPLC-APCIMS/MS, Phytochem. Anal., 13, 87, 2002. [Pg.530]

Isorhamnetin glycosides 1-3-0-glucoside, I-3-O-rutinosidc ( = narcissin), 1-3-0-rutiiiosyl-rhamnoside Qiiercetin-3-O-glucoside and 3-0-g uco-rhamnoside (<0.2%)... [Pg.198]

Ginkgo leafs Quercetin, kaempferol and isorhamnetin glycosides ... [Pg.237]

Addi Nait M Bark Dominique Guillaume Yahia Cherrah Jean Michel Wieruszeski Guy Ricart and Zoubida Charrouf. An Acylated isorhamnetin Glycosides from Hemiaria Fontanesii. Phytochemystry, (1996), 41, 989... [Pg.319]

An examination of the flavonoids of Villarsia (Bohm et al., 1986) revealed a heterogeneous array of flavonol glycosides, based upon kaempferol, quercetin, and isorhamnetin, with each species exhibiting a unique assortment. Surprisingly, there were greater similarities between the pigment profile of V capensis and species from eastern Australia, V exaltata (Soland. ex Sims) G. Don from Tasmania and V. reniformis R. Br. from New South Wales, than with species native to... [Pg.187]

Mild extraction was also found to be effective in the analysis of extracts of Flaveria haumanii, l in which quercetin, kaempferol, isorhamnetin as well as their glycosides and sulfate esters were identified. The obtained results were useful in the identification of the colourants from fibres from pre-Columbian Andean textiles extracted with the use of water-methanol solution with formic or hydrochloric acid. The components of each extract were separated on a reversed phase HPLC column and the eluates were monitored at... [Pg.375]

Flaveria haumanii, Cotinus coggygria, Coreopsis spp. and pre Columbian Andean textiles Okanine, luteolin, butein (as aglycones, glycosides or as methyl ethers), quercetin, isorhamnetin (as sulfate esters), sulfuretin, fisetin, hydroxybenzoic acids HCI/Me0H/H20, HCOOH/MeOH A H20 B ACN C H20 with HCOOH 254, 350 nm/ESI (+) Column C4 7... [Pg.376]

Kaempferol, isorhamnetin, and their 3- and 7-0-glycosides yellow-green... [Pg.11]

Sikorska, M. and Matlawska, I., Kaempferol, isorhamnetin and their glycosides in the flowers of Asclepias syriaca L., Acta Pol. Pharm., 58, 269, 2001. [Pg.803]

Two catechins, ( + )catechin and ( — )epicatechin, and two leucoanthocyanins were isolated from Bartlett pears by Nortje (165).. Durkee et al. (166) identified arbutin (p-hydroxphenyl-/ -D-glucoside) in mature and immature pears. Several flavanol glycosides such as quercetin 3-glucoside, isorhamnetin-3-glucoside, isorhamnetin-3-rutinoside, isorham-netin-3-galactoside, and quercetin-7-xyloside were identified by Duggan (167). [Pg.37]

Isorhamnetin (= 3,5,7,3, 4 -Pentahydroxyflavone 3 -methyl ether (flpvonol) Widespread aglycone glycoside in Arnica, Artemisia dracunculus, Haplopappus (Asteraceae) spp. Aminopeptidase N (49% inhibition at 300 pM) [63]... [Pg.577]

Flavonols are the most common flavonoids in plant-derived food products, and they often occur as glycosidic combinations of myricetin, quercetin, and kaempferol and their methyl ethers (isorhamnetin and tamarixetin). Flavonols are relevant in onions, apples, green tea, grapes,... [Pg.208]

See other pages where Isorhamnetin glycosides is mentioned: [Pg.525]    [Pg.282]    [Pg.146]    [Pg.203]    [Pg.216]    [Pg.946]    [Pg.423]    [Pg.4175]    [Pg.525]    [Pg.282]    [Pg.146]    [Pg.203]    [Pg.216]    [Pg.946]    [Pg.423]    [Pg.4175]    [Pg.49]    [Pg.83]    [Pg.128]    [Pg.193]    [Pg.274]    [Pg.296]    [Pg.109]    [Pg.377]    [Pg.164]    [Pg.557]    [Pg.15]    [Pg.275]    [Pg.327]    [Pg.413]    [Pg.759]    [Pg.783]    [Pg.789]    [Pg.168]    [Pg.169]    [Pg.571]    [Pg.789]    [Pg.185]    [Pg.47]    [Pg.50]    [Pg.385]    [Pg.279]    [Pg.295]   
See also in sourсe #XX -- [ Pg.198 , Pg.205 , Pg.210 , Pg.216 ]



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