Table 3.

In vitro antioxidant activity evaluation of samples against DPPH radicals.

Compound	% inhibition (DPPH scavenging) at different concentrations				IC50 μg/mL
	50 μg/mL	100 μg/mL	300 μg/mL	500 μg/mL
3a	33.75 ± 0.42	36.04 ± 0.18	55.83 ± 0.26	74.79 ± 0.32	145.21 ± 0.09
3b	52.26 ± 1.25	58.63 ± 0.92	69.33 ± 0.45	78.84 ± 0.58	52.36 ± 0.12
3c	35.28 ± 0.44	48.22 ± 1.01	51.06 ± 0.63	60.71 ± 0.52	187.49 ± 0.11
3d	51.33 ± 0.36	59.83 ± 0.42	67.33 ± 0.36	76.29 ± 0.38	56.36 ± 0.07
3e	48.26 ± 0.11	55.23 ± 0.68	65.85 ± 1.05	73.75 ± 0.84	67.60 ± 0.15
3f	28.33 ± 0.24	42.08 ± 0.46	44.38 ± 0.58	59.58 ± 0.24	331.13 ± 0.21
3g	53.78 ± 0.66	59.28 ± 0.32	69.86 ± 0.86	78.52 ± 0.23	50.11 ± 0.14
3h	45.46 ± 0.24	56.92 ± 0.36	62.83 ± 0.56	71.00 ± 0.42	76.91 ± 0.32
3i	34.26 ± 0.44	40.23 ± 0.65	52.65 ± 0.46	63.71 ± 1.03	200.91 ± 0.25
3j	36.04 ± 0.36	41.46 ± 0.26	45.63 ± 0.26	47.08 ± 0.42	438.53 ± 0.45
3k	38.26 ± 0.15	45.26 ± 0.32	56.52 ± 0.13	68.25 ± 0.52	128.82 ± 0.62
3l	43.82 ± 0.42	51.25 ± 0.41	60.41 ± 0.33	67.65 ± 0.84	97.72 ± 0.22
Ascorbic acid	55.36 ± 0.18	60.32 ± 0.24	70.85 ± 0.42	80.32 ± 0.12	46.99 ± 0.15

All the values are expressed as Mean ± SEM, n = 3.