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New Isoflavones with Antioxidant Activity Isolated from Cornulaca monacantha
Author(s) -
Mhiri Rania,
Koubaa Imed,
Chawech Rachid,
Auberon Florence,
Allouche Noureddine,
Michel Thomas
Publication year - 2020
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.202000758
Subject(s) - chemistry , abts , dpph , phytochemical , vanillic acid , isoflavones , antioxidant , stereochemistry , organic chemistry , biochemistry
In the course of phytochemical and chemotaxonomical investigations of Cornulaca monacantha (Amaranthaceae), two new isoflavones, 3‐(2‐hydroxyphenyl)‐5,7‐dimethoxy‐6‐(methoxymethyl)‐4 H ‐1‐benzopyran‐4‐one ( 1 ) and 7‐hydroxy‐3‐(4‐hydroxyphenyl)‐5‐methoxy‐6‐(methoxymethyl)‐4 H ‐1‐benzopyran‐4‐one ( 2 ) were isolated from the fresh aerial parts of C. monacantha among with three known compounds named vanillic acid ( 3 ), N ‐ cis‐ feruloyltyramine ( 4 ) and N ‐ trans‐ feruloyltyramine ( 5 ). Their structures were elucidated by means of spectroscopic methods including one‐ and two‐dimensional NMR and HR‐ESI‐MS techniques. The isolated compounds exhibited interesting antioxidant activity determined by DPPH, ABTS and TAC tests.