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. 2023 Jun 20;13(27):18496–18510. doi: 10.1039/d3ra02344c

Percent of antioxidant activity of the new coumarin compoundsa.

Compounds Concentration (0.01 mg) Concentration (0.05 mg)
4a 31.8 ± 0.2 40.9 ± 3.1
4b 31.8 ± 1.2 35.00 ± 1.00
4c 28.00 ± 0.4 57.14 ± 2.77
4d 4.5 ± 0.4 10.3 ± 0.33
Vitamin C 80.00 ± 5.00 89.00 ± 6.99
a

Data are means ± SD of three replicates in each group.