A New fatty acid and some triterpenoids from propolis of Nkambe (North-West Region, Cameroon) and evaluation of the antiradical scavenging activity of their extracts

Open Chemistry

Mahamat Abakar Ali¹  Talla Emmanuel¹  Nyemb Jean Noël¹  Céline Henoumont²  Sophie Laurent²  Mbafor Joseph Tanyi³  Gade Isaac Silvère³  Ngenge Alfred Tamfu³ 

[1] Department of Chemistry, Faculty of Science, University of Ngaoundere, P.O. BOX 454, Ngaoundere, Cameroon;Department of General, Organic and Biomedical Chemistry, Faculty of Science, University of Mons-Hainaut, NMR and Molecular Imaging Laboratory, B-7000Mons, Belgium;Department of Organic Chemistry, Faculty of Science, University of Yaounde 1, P.O. BOX 812, Yaounde, Cameroon;

关键词: propolis;    antiradical activity on dpph;    polyphenol content;    hexatriacontanoic acid;   

DOI  :  10.1515/chem-2020-0016

来源: DOAJ

【 摘 要 】

The aim of this work was to evaluate in vitro antiradical scavenging activity of propolis from Nkambe (North-West, Cameroon). The polyphenol content of the acetone extract was evaluated using the Folin-Ciocalteu reagent as 0.166±0.008 gGAE/100 gRM. Antiradical scavenging activity of hexane and acetone extracts was carried out on DPPH using ascorbic acid as standard. The results showed that the extracts possess antiradical activity with IC50 of 141 μg/mL and 267 μg/mL for acetone and hexane extracts, respectively. The column chromatography separation on silica gel of the hexane fractionyielded compounds 1 to 3. The structures of these compounds were elucidated by NMR and mass spectrometry data as Lupenone (1), a mixture of α and ß-Amyrin (2) and lastly Hexatriacontanoic acid (3) which was described for the first time from propolis.

【 授权许可】

Unknown