Table 2.

The total antioxidant activity (EC₅₀ mg/mL) of the derivatives 6a, 6b, 7a_1–7, 7b_1–7.

Sample	EC50 mg/mL	Sample	EC50 mg/mL
6a	0.133 ± 0.0045	6b	0.124 ± 0.0009
7a1	0.105 ± 0.0025	7b1	0.090 ± 0.0018
7a2	0.099 ± 0.0038	7b2	0.092 ± 0.0008
7a3	0.048 ± 0.0023	7b3	0.043 ± 0.0026
7a4	0.076 ± 0.0025	7b4	0.099 ± 0.0024
7a5	0.025 ± 0.0012	7b5	0.022 ± 0.0013
7a6	0.033 ± 0.0014	7b6	0.026 ± 0.0018
7a7	0.037 ± 0.0007	7b7	0.043 ± 0.0028
AA	0.0067 ± 0.0003

Data are mean ± SD (n = 3, p< 0.05).