Fisetinidin Explained

Fisetinidin is an anthocyanidin. It has been obtained from the heartwood of Acacia mearnsii,^[1] from the bark of Rhizophora apiculata^[2] and can also be synthesized.^[3] Fisetinidin is very similar in structure to fisetin, which itself differs in structure from quercetin only by an additional hydroxyl group on the latter.

An assay of twenty flavonoids showed fisetinidin to be the least effective in inhibition of CD38 enzyme.^[4]

Tannins

Fisetinidin can compose tannins.^[1] The polymers are then called profisetinidin (Porter, 1992).^[2]

See also

• Leuco-fisetinidin
• List of compounds with carbon number 15

Notes and References

1. Condensed tannins. 12. Polymeric leuco-fisetinidin tannins from the heartwood of Acacia mearnsii . D. G. Roux . E. Paulus . Biochem. J. . February 1962 . 82 . 2 . 320–324 . 1243455 . 14494576 . 10.1042/bj0820320.
2. Antioxidant activities of mangrove Rhizophora apiculata bark extracts . Afidah A. Rahim . Emmanuel Rocca . Jean Steinmetz . M. Jain Kassim . M. Sani Ibrahim . Hasnah Osman . 2008 . Food Chemistry . 107 . 1 . 200–207 . 10.1016/j.foodchem.2007.08.005 .
3. Antibacterial Effect of Fisetin and Fisetinidin . M. Gábor . E. EperJessy . Nature . 212 . 1273 . 10 December 1966 . 10.1038/2121273a0 . 21090477 . 1273. 4262402 . free .
4. Kellenberger E, Kuhn I, Schuber F, Muller-Steffner H . Flavonoids as inhibitors of human CD38 . . 21 . 13 . 3939-3942 . 2011 . 10.1016/j.bmcl.2011.05.022 . 21641214.