Table 2 DPPH and ABTS radical-scavenging IC₅₀ values of compounds 1–13 from CE

Gallic acid (1)

Protocatechuic acid (2)

Vanillic acid (3)

p-Coumaric acid (4)

Rutin (5)

Ferulic acid (6)

Isoquercitrin (7)

Astragalin (8)

Quercetin (9)

Luteolin (10)

Apigenin (11)

Tricin (12)

Kaempferol (13)

Ascorbic acid

0.226 ± 0.001

0.411 ± 0.002

0.103 ± 0.000

0.146 ± 0.000

0.345 ± 0.001

0.426 ± 0.000

0.321 ± 0.001

0.312 ± 0.001

0.128 ± 0.002

0.628 ± 0.001

0.629 ± 0.001

0.558 ± 0.000

0.583 ± 0.000

0.155 ± 0.000

0.064 ± 0.003

0.168 ± 0.007

0.098 ± 0.000

0.082 ± 0.000

0.290 ± 0.002

0.131 ± 0.001

0.291 ± 0.003

0.188 ± 0.002

0.068 ± 0.002

0.152 ± 0.000

0.263 ± 0.001

0.340 ± 0.010

0.340 ± 0.003

0.169 ± 0.001