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Chemical structures of flavonoids and flavonoid glycosides from Sarraceniaceae species: (a) basic flavonoid structure; (b) cyanidin; (c) delphinidin; (d) taxifolin; (e) taxifolin-3-O-glucoside; (f) isorhamnetin-3-O-glucoside; (g) kaempferol; (h) kaempferol-3-O-rutinoside; (i) quercetin-3-O-galactoside; (j) quercetin-3-O-glucoside; (k) quercetin-3-O-rutinoside; (l) (+)-catechin; (m) (−)-epicatechin.
