Table 1.

Antioxidant activity of compounds 4–9 by DPPH method.

Compd.	Scavenging Effect (%)						IC50 (μM)
-	25 μM	50 μM	75 μM	100 μM	125 μM	250 μM	-
4	30.54 ± 1.32	64.37 ± 1.35	74.86 ± 1.40	85.39 ± 1.45	95.99 ± 1.50	97.18 ± 1.42	39.39
5	30.39 ± 1.18	63.58 ± 1.62	74.12 ± 1.34	84.69 ± 1.83	95.36 ± 1.87	96.90 ± 1.39	39.79
6	29.14 ± 1.53	59.28 ± 1.23	71.23 ± 1.32	83.23 ± 1.42	95.35 ± 1.18	97.11 ± 1.12	42.32
7	15.88 ± 1.03	24.74 ± 1.32	33.30 ± 1.67	37.93 ± 1.49	46.14 ± 1.45	67.70 ± 1.68	147.79
8	15.56 ± 0.95	24.36 ± 1.19	32.18 ± 1.48	40.58 ± 1.41	48.38 ± 1.54	72.45 ± 1.42	133.80
9	13.96 ± 0.97	22.99 ± 1.05	31.74 ± 1.56	38.63 ± 1.59	43.03 ± 1.63	58.52 ± 1.55	182.60
AA	0.70 ± 1.00	1.08 ± 0.84	17.48 ± 1.03	34.91 ± 0.69	84.12 ± 0.48	91.26 ± 0.49	107.67
BHA	23.27 ± 1.39	48.99 ± 1.42	64.77 ± 1.32	73.89 ± 1.59	81.74 ± 1.45	89.30 ± 1.37	51.62
BHT	-	-	-	-	-	23.05 ± 1.32	423.37