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Two very unusual macrocyclic flavonoids from the water lily nymphaea lotus

Elegami, A.A. and Bates, C.D. and Gray, A. and Mackay, S.P. and Skellern, G.G. and Waigh, R.D. (2003) Two very unusual macrocyclic flavonoids from the water lily nymphaea lotus. Phytochemistry, 63 (6). pp. 727-731. ISSN 0031-9422

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Abstract

Three novel flavonols, myricetin-3′-O-(6″-p-coumaroyl)glucoside and two epimeric macrocyclic derivatives, as well as the known myricetin-3-O-rhamnoside and pentagalloyl glucose, have been isolated from the wild water lily Nymphaea lotus L. and identified using 2D NMR. This is the first report of such a macrocycle from any source.