New Isorhamnetin Glycosides and other Phenolic Compounds from Calendula officinalis
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A total of 39 known compounds and two new flavonoid glycosides that were identified as isorhamnetin-3-O-(2″-acetyl)-β-D-glucopyranoside and isorhamnetin-3-O-(2″,6″-diacetyl)- β-D-glucopyranoside were isolated from florets of Calendula officinalis (Asteraceae). The distribution of phenolic compounds in morphological groups of C. officinalis was studied. It was found that peripheral florets had the highest flavonoid content (36.66 mg/g); tubular florets (9.95 mg/g) and leaves (9.65 mg/g), phenylpropanoids. Anthocyanins, among which cyanidin derivatives dominated, were identified for the first time in C. officinalis florets.
KeywordsCalendula officinalis Asteraceae isorhamnetin-3-O-(2″-acetyl)-β-D-glucopyranoside isorhamnetin-3-O-(2″,6″-diacetyl)-β-D-glucopyranoside flavonoids anthocyanins HPLC
The work was supported financially by the RFBR Project 12-03-31547(mol_a).
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