Chemical Constituents of Root Barks of Gnidia involucrata and Evaluation for Antibacterial and Antioxidant Activities

Table 3

DPPH radical-scavenging and antilipid peroxidation activities of extracts (EtOAc and MeOH) and isolated compounds (1 and 2).

Samples	% DPPH inhibition				Antilipid peroxidation inhibition (%)
	100 μg/mL	50 μg/mL	25 μg/mL	12.5 μg/mL
EtOAc extract	70.7 ± 0.02	64.1 ± 0.04	57.5 ± 0.03	46.2 ± 0.05	84 ± 0.04
MeOH extract	66.9 ± 0.01	61.3 ± 0.02	54.7 ± 0.01	41.5 ± 0.10	45 ± 0.06
Compound 1	85.8 ± 0.03	79.2 ± 0.05	73.4 ± 0.01	65.0 ± 0.02	86 ± 0.01
Compound 2	52.8 ± 0.01	41.5 ± 0.01	34.9 ± 0.02	16.9 ± 0.03	33 ± 0.09
Ascorbic acid	90 ± 0.02				87 ± 0.02

Data are reported as mean ± SEM; ascorbic acid was used as a positive control.