Table 3 ABTS⁺ radical scavenging activity of 80% methanol extract of Mongolian I. bungei and its n-hexane, EtOAc-, n-BuOH-, and H₂O-soluble fractions

Samples	Inhibition (%)					IC50 (μg/mL)
	100	50	25	12.5	6.3
	80% MeOH ext.	66.3±2.1d1)	49.7±1.3c	35.3±2.1c	18.8±2.1bc		9.8±1.3b	50.9±1.9
n-Hexane layer	48.4±1.4e	31.9±1.1d	13.9±0.1d	7.6±0.2cd	1.5±0.1c	>200
EtOAc layer	89.2±1.8b	72.8±3.1b	43.6±1.3b	24.7±0.3b	10.0±0.8b	27.8±0.9
n-BuOH layer	40.1±1.3f	23.7±1.1d	12.6±1.0d	3.4±1.2d	0.9±1.4c	>200
H2O layer	72.6±2.1c	51.6±2.3c	37.8±0.5c	15.2±1.4b	7.1±1.1b	45.2±3.0
(+)-Catechin2)	99.7±0.1a	97.5±0.1a	85.2±1.2a	39.3±1.1a	32.7±0.7a	14.6±0.4

Scavenging activities are expressed as the mean±SD of triplicate experiments. Mean separation within columns of respective seasons by Duncan’s multiple range test at p=0.05.
(+)-Catechin was used as a positive control.