Structure and antioxidant activity data of compounds 66(a–g).

Compounds	R1	R	Concentration in (μg mL−1)
			200	100	50
66a (ref. 96)	Morpholine	Br	95.3	95.3	91.9
66b (ref. 96)	Morpholine	OMe	100	95.3	88.1
66c (ref. 96)	N-methyl piperazine	OMe	94.6	80.2	28.7
66d (ref. 96)	Thiomorpholine	Br	98.1	91	89.8
66e (ref. 96)	1-Pyridyl-2-ylpiperazine	Br	97.9	94	85.7
66f (ref. 96)	1-Pyridyl-2-ylpiperazine	OMe	100	97.2	93.6
66g (ref. 96)	2-Piperzin-1-ylethanol	OMe	94.2	93.2	92.6
l-Ascorbic acid			99.2	99	98.8