Activity-Guided Isolation of Antioxidant Principles from Limoniastrum feei (Girard) Batt

Abstract

Abstract Bioguided fractionation of a leaves extract from Limoniastrum feei (Girard) Batt. (Plumbaginaceae) led to the isolation of seven polyphenolic constituents: gallic acid (1), myrciaphenone A (2), myricetin-3-O-β-galactopyranoside (3-1), epigallocatechin gallate (3-2), myricetin 3-O-α-rhamnopyranoside (4), quercetin (5) and myricetin (6). Gallic acid was the most antioxidant compound in DPPH [(0.94 d 0.68) μg/mL] and FRAP [(0.83 d 0.15) μm Fe2+/mL] tests, whereas myricetin was a more specific superoxide radical scavenger since it was the most active product in the superoxide nitroblue tetrazolium hypoxanthine/xanthine oxidase test [(1.86 d 0.12) μg/mL].