Abstrakt

Major anthocyanin structure elucidation and radical-scavenging activities of total anthocyanins extract from terminaliacatappa red leaves

Kouzoungui Ayina, AdamaHema, Constantin Dabir�������©, Eloi Pal�������©, PierreDuez, Michel Luhmer, Mouhoussine Nacro

Terminaliacatappared leaves contained anthocyanin pigments possessing Radical- ScavengingActivities (RSA) comparable to those ofAscorbic acid. TotalAnthocyanins Extract Content (TAEC) was estimated at 6 mg of kuromanintetrafluoro acetate (KTFA) eq./g of dried material. Cyanidin 3-O-â-Dglucopyranoside (KTFA), was isolated and characterized using chemical, chromatographic and spectral methods. RSA of TAE were lower (10.57%Inhibition; 87.78%Inhibition) than ascorbic acid (26.72 % Inhibition; 92.30% Inhibition) respectively on both 2,2-Diphényl-1- picrylhydrazyl radical and 2,2Â’-azinobis (3- ethylbenzothiazoline-6-sulfonic acid radical-cation.