Phytochemical Tests, Assessment of Antioxidant Properties and Isolation of Two Compounds of Ethyl Acetate Extract of Chadian Propolis: Case of Bebotho (Southern Chad)

The present work deals with the research of chemical constituents and evaluation antioxidant properties Bebotho propolis. From ethyl acetate extract, we isolated, using various chromatographic techniques, a mixture two identical compounds (isomers) indexed PBy4a PByb. structures these were elucidated by means spectroscopic analysis techniques (MS, IR, 1H-NMR, 13C-NMR, HMBC HSQC) comparison spectral data those described in literature. Thus, identified to chromones namely 5,7-dihydroxy-2-methylchromone-6-C-α-D-glucopyranoside 5,7-dihydroxy-2-methylchromone-8-C-β-D-glucopyranoside, first reported study antiradical power, chelating power quantification phenolic compound same extracts, showed interesting that propolis extracts have scavenge free radicals.