Compounds*

Antioxidant activity values by ORAC (µM trolox)

Experimental measurements

Theoretical measurements

Synergism

Uric acid + ascorbic acid

4221.8 ± 363.3^a

12355.6 ± 459.3^b

NO

uric acid + Protocatechuic acid

12150.0 ± 410.1

11480.8 ± 288.7

X

Uric acid + 3,4-dihydroxyphenylacetic acid

6636.6 ± 600.2

7098.4 ± 178.9

X

Uric acid + 3,4-dihydroxyphenylpropionic acid

9888.0 ± 916.4

12529.4 ± 207.6

X

Uric acid + 3-hydroxyphenylacetic acid

1009.7 ± 372.7^a

3685.3 ± 174.6^b

NO

Ascorbic acid + Protocatechuic acid

11615.0 ± 3174.0

17999.8 ± 486.8

X

Ascorbic acid + 3,4-dihydroxyphenylacetic acid

16773.1 ± 836.7^a

13617.3 ± 430.8^b

YES

Ascorbic acid + 3,4-dihydroxyphenylpropionic acid

1050.6 ± 75.6^a

19048.3 ± 443.5^b

NO

Ascorbic acid + 3-hydroxyphenylacetic acid

1973.5 ± 172.9^a

10204.3 ± 429.1^b

NO

Uric acid + ascorbic acid + protocatechuic acid

31575.5 ± 5456.7^a

20918.2 ± 477.2^b

YES

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

6662.3 ± 109.1^a

16535.6 ± 428.6^b

NO

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

10919.6 ± 1618.8^a

21966.6 ± 439.5^b

NO

Uric acid + Ascorbic acid + 3-hydroxyphenylacetic acid

7495.6 ± 347.1^a

13122.6 ± 427.1^b

NO