Open Access. Powered by Scholars. Published by Universities.®
Natural Products Chemistry and Pharmacognosy Commons™
Open Access. Powered by Scholars. Published by Universities.®
Zingiber spectabile Griff.; Zingiberaceae; Dimeric flavonol glycoside; Bisflavonol glycoside; Spectaflavoside A; Iron chelating activity
Articles 1 - 1 of 1
Full-Text Articles in Natural Products Chemistry and Pharmacognosy
Spectaflavoside A, A New Potent Iron Chelating Dimeric Flavonol Glycoside From The Rhizomes Of Zingiber Spectabile Griff, Kok Hoong Leong
Spectaflavoside A, A New Potent Iron Chelating Dimeric Flavonol Glycoside From The Rhizomes Of Zingiber Spectabile Griff, Kok Hoong Leong
Kok Hoong Leong
The rhizomes of Zingiber spectabile yielded a new dimeric flavonol glycoside for which the name kaempferol-3-O-(4″-O-acetyl)-α-l-rhamnopyranoside-(I-6,II-8)-kaempferol-3-O-(4″-O-acetyl)-α-l-rhamnopyranoside; spectaflavoside A (1) was proposed, along with kaempferol and its four acetylrhamnosides (2–6), demethoxycurcumin (7) and curcumin (8). The structure of spectaflavoside A was elucidated by spectroscopic methods including, 1D and 2D NMR techniques. This is the first report on the occurrence of a dimeric flavonol glycoside in the Zingiberaceae and the second in nature. Spectaflavoside A was found to be a potent iron chelating agent.