Figure 3.
The chemical structures and names of the mains flavonoid O- (starting by O), C-glycosides (starting by C) and quercetin (Quer) and Diosmetin (Dio) aglycones from Nelumbo nucifera tissues. Flavonoid abbreviations used: Myr, myrycetin; Quer, quercetin; Kae, kaempferol; Iso, isorhamnetin; Syr, syringetin; Dio, diosmetin; Api, apigenin; Lut, luteolin. Sugar abbreviations used: Glc, glucoside; Gal, galactoside; Ara, arabionoside; Gln, glucuronide; Rut, rutinoside; Hex, hexoside; Xyl, xylose; Rha, rhamnose; Pen, pentose. 1 rutin, quercetin 3-O-rhamnopyranosyl-(1→6)-glucopyranoside; 2 hyperoside, quercetin 3-O-galactoside; 3 isoquercitrin, quercetin 3-O-glucoside; 4 Astragalin, kaempferol 3-O-glucoside; 5 orientin, luteolin 8-C-β-D-glucopyranoside; 6 isoorientin, luteolin 6-C-β-D-glucopyranoside; 7 vitexin, apigenin 8-C-β-D-glucopyranoside; 8 isovitexin, apigenin 6-C-β-D-glucopyranoside. Adapted from Chen et al. [25] and Li et al. [35].