Antioxidant activity of compounds 6(a–d) and 8(a–l).

Compound	Antioxidant activity
	DPPH method IC50 (μM mL−1)	H2O2 method IC50 (μM mL−1)
6a	2.24 ± 0.93	3.524 ± 0.47
6b	20.00 ± 0.34	23.57 ± 0.68
6c	293.18 ± 0.25	7.07 ± 0.02
6d	4.5 ± 0.47	1.35 ± 0.45
8a	3.5 ± 0.25	1.76 ± 0.06
8b	338.48 ± 0.47	124.48 ± 0.53
8c	42.50 ± 0.58	1.45 ± 0.45
8d	1.11 ± 0.43	71.21 ± 0.47
8e	343.33 ± 0.58	343.33 ± 0.57
8f	3.72 ± 0.69	1.72 ± 0.47
8g	18.57 ± 0.12	18.57 ± 0.69
8h	2.51 ± 0.36	42.51 ± 0.47
8i	4.8 ± 0.24	4.8 ± 0.56
8j	1.29 ± 0.35	1.269 ± 0.14
8k	0.061 ± 0.38	0.061 ± 0.41
8l	3.524 ± 0.65	3.06 ± 0.32
Ascorbic acid	1.46 ± 0.52	1.16 ± 0.89