Open AccessNew diacyl flavonoid derivatives from the Egyptian plant Blepharis edulis (Forssk.) Pers.
Author(s) -
Mohamed A. Ashour
Publication year - 2015
Publication title -
bulletin of faculty of pharmacy, cairo university /bulletin of faculty of pharmacy, cairo university
Language(s) - English
Resource type - Journals
eISSN - 2090-9101
pISSN - 1110-0931
DOI - 10.1016/j.bfopcu.2015.02.001
Subject(s) - acanthaceae , apigenin , tricin , chemistry , naringenin , acacetin , phytochemical , flavonoid , stereochemistry , botany , biology , organic chemistry , biochemistry , antioxidant
In continuation of our phytochemical investigation of Blepharis edulis (Forssk.) Pers., family Acanthaceae; two new diacyl flavone derivatives: apigenin-7-O-(2″-acetyl-6″-E-p-coumaroyl-β-d-glucopyranoside) (1) and apigenin-7-O-(4″-acetyl-6″-E-p-coumaroyl-β-d-glucopyranoside) (2), along with eight known compounds: apigenin-7-O-(3″-acetyl-6″-E-p-coumaroyl-β-d-glucopyranoside) (3), naringenin-7-O-(3″-acetyl-6″-E-p-coumaroyl-β-d-glucopyranoside) (4), apigenin-7-O-(6″-E-p-coumaroyl-β-d-glucopyranoside) (5), naringenin-7-O-(6″-E-p-coumaroyl-β-d-glucopyranoside) (6), acacetin (7), naringenin (8), vanillic acid (9) and 4-hydroxybenzoic acid (10) were isolated and unambiguously identified from the ether fraction of the total extract of the wild Egyptian species B. edulis (Forssk.), family Acanthaceae. Identification and structure elucidation of the isolated compounds were carried out and confirmed through full data obtained from different 1D and 2D NMR experiments and mass spectral analyses. Compounds 1–9 were isolated for the first time from the species. Compounds 1 and 2 are new natural products isolated herein for the first time in nature