Synthesis and Biological Evaluation of Novel 5,7-Dichloro-1,3-benzoxazole Derivatives

Table 4

DPPH radical scavenging activity of compounds 4–11.

Compounds	DPPH radical scavenging activity (%) of different
	concentrations (μg/mL) of compounds 4–11
	400	200	100	50	25
4	85.71	73.01	68.25	60.32	53.96
5	97.56	95.12	93.90	92.68	91.46
6	73.01	57.14	55.55	53.96	47.62
7	95.24	93.65	93.65	92.06	90.47
8	96.82	95.04	93.05	87.30	85.71
9	90.47	85.71	73.01	60.32	53.96
10	92.68	87.80	71.95	67.07	64.63
11	93.65	90.47	88.89	76.19	71.42
Standard	97.33	95.12	93.14	90.33	86.69

Standard-acetic acid.