Table 6.

DPPH radical scavenging activity of the extracts and isolated compounds.

Sample	% inhibition of DPPH radical					IC50 value (μg/mL)
	1000	500	250	125	62.5
Ascorbic acid	97.9 ± 0.06	97.3 ± 0.05	97.2 ± 0.05	97.0 ± 0.1	96.9 ± 0.06	0.5
MeOH extract	91.1 ± 0.06	82.8 ± 0.2	73.2 ± 0.06	60.7 ± 0.06	56.7 ± 0.06	49.4
n-hexane: EtOAc (1 : 1) extract	81.5 ± 0.12	78.5 ± 0.15	67.2 ± 0.1	54.6 ± 0.12	41.7 ± 0.2	73.1
3	40.3 ± 0.2	35.2 ± 0.2	33.1 ± 0.2	31.9 ± 0.2	30.3 ± 0.3	19.4
5	95.4 ± 0.1	94.5 ± 0.2	94.0 ± 0.1	93.3 ± 0.1	92.1 ± 0.1	2.1
6	95 ± 0.2	94.3 ± 0.2	94.2 ± 0.2	88.0 ± 0.1	86.5 ± 0.2	7.4

Note. The %inhibition was reported as mean ± SD.