Compounds^*

Antioxidant activity values by FRAP (µM Fe²⁺)

Experimental measurements

Theoretical measurements

Sinergism

Uric acid+ascorbic acid

2210.6 ± 66.3^a

681.1 ± 28.1^b

YES

uric acid+ Protocatechuic acid

1404.6 ± 4.4

1318.7 ± 32.5

X

Uric acid+3,4-dihydroxyphenylacetic acid

1641.8 ± 25.3

2145.7 ± 33.4

X

Uric acid+3,4-dihydroxyphenylpropionic acid

4491.8 ± 66.3^a

1827.9 ± 60.5^b

YES

Uric acid+3-hydroxyphenylacetic acid

46.6 ± 1.0

581.6 ± 27.5

NO

Ascorbic acid+Protocatechuic acid

1014.0 ± 8.8

1288.8 ± 19.5

X

Ascorbic acid+3,4-dihydroxyphenylacetic acid

839.0 ± 8.8^a

2115.8 ± 22.5^b

NO

Ascorbic acid+3,4-dihydroxyphenylpropionic acid

304.4 ± 22.1^a

1798.1 ± 54.6^b

NO

Ascorbic acid+3-hydroxyphenylacetic acid

51.9 ± 11.5^a

551.8 ± 8.8^b

NO

Uric acid+ascorbic acid+protocatechuic acid

1402.2 ± 33.2

1647.9 ± 30.8

X

Uric acid+Ascorbic acid+3,4-dihydroxyphenylacetic acid

4913.7 ± 88.4^a

2471.2 ± 32.5^b

YES

Uric acid+Ascorbic acid+3,4-dihydroxyphenylpropionic acid

710.6 ± 22.1^a

2153.5 ± 56.4^b

NO

Uric acid+Ascorbic acid+3-hydroxyphenylacetic acid

198.4 ± 16.9^a

907.2 ± 26.3^b

NO