Table 2.

Scavenging activity % on DPPH radicals of the most active compounds at a concentration of 20µg/l.

Compd. No	Scavenging Activity (%) a at Different Time (min)
	15	30	45	60
11a	6.86 ± 1.17	10.26 ± 1.37	17.73 ± 1.28	26.87 ± 1.56
11b	9.60 ± 1.77	14.28 ± 1.52	20.44 ± 1.65	30.76 ± 2.04
11c	40.65 ± 1.28	40.65 ± 1.81	40.65 ± 1.67	40.65 ± 1.35
12a	56.43 ± 1.08	67.09 ± 1.45	76.92 ± 1.51	81.41 ± 1.37
12b	17.29 ± 1.53	23.46 ± 1.64	30.56 ± 1.49	40.65 ± 1.46
12c	9.76 ± 1.76	10.24 ± 1.26	11.39 ± 1.53	13.97 ± 1.55
13a	41.14 ±1.25	45.77 ± 1.36	56.55 ± 1.99	64.08 ± 2.01
13b	43.52± 1.98	47.05 ± 1.81	56.33 ± 1.29	65.55 ± 1.55
13c	13.97± 1.36	20.97 ± 1.26	23.96 ± 1.51	35.13 ± 1.61
13d	19.32± 1.24	31.32 ± 1.81	25.92 ± 1.24	39.70 ± 1.99
13e	9.10 ± 1.38	26.15 ± 1.26	36.70 ± 1.62	48.13 ± 1.82
13f	17.90 ± 1.62	28.28 ± 1.61	34.28 ± 1.27	40.74 ± 1.54
13g	25.95 ± 1.85	44.00 ± 1.46	49.25 ± 1.77	53.67 ± 1.81
13h	15.22 ± 1.98	16.31 ± 1.96	20.58 ± 1.48	35.71 ± 1.91
14i	45.88 ± 1.05	54.32 ± 1.08	60.60 ± 1.64	69.18 ± 1.65
14a	41.09 ± 2.05	51.52 ± 1.91	53.98 ± 2.06	59.22 ± 2.14
14b	42.36 ± 1.45	58.08 ± 1.28	60.27 ± 1.66	65.96 ± 1.64
14c	14.85 ± 1.36	22.56 ± 1.79	26.29 ± 1.23	39.48 ± 1.61
14d	39.91 ± 1.75	41.82 ± 1.49	44.96 ± 1.37	55.44 ± 1.33
14e	17.89 ± 1.23	28.18 ± 1.27	30.87 ± 1.98	34.89 ± 1.72
14f	9.05 ± 1.63	10.15 ± 1.83	16.19 ± 1.21	22.93 ± 1.62
14g	8.39 ± 1.14	11.87 ± 1.23	14.08 ± 2.01	26.55 ± 2.13
14h	57.93 ± 1.36	67.35 ± 1.35	72.00 ± 1.82	85.99 ± 2.17
14i	39.91 ± 1.87	41.82 ± 1.09	44.96 ± 1.66	55.44 ± 1.55
15a	9.36 ± 1.25	14.15 ± 1.61	20.39 ± 1.92	24.77 ± 2.05
15b	23.60 ± 1.36	32.73 ± 1.13	39.23 ± 1.29	47.48
Negative control	0	0	0	0
Ascorbic acid	94.37 ± 1.74	97.45 ± 1.32	98.78 ± 0.94	99.67 ± 0.28

^a Results are the mean of three independent experiments. Data = mean ± SD.