| Compounds | Observed rate constant (Kobs/s−1) |
| Protocatechuic acid + uric acid | 0.012 |
| Protocatechuic acid + ascorbic acid | 0.012 |
| Protocatechuic acid + uric acid + ascorbic acid | 0.012 |
| 3,4-dihydroxyphenylacetic acid + uric acid | 0.005 |
| 3,4-dihydroxyphenylacetic acid + ascorbic acid | 0.190 |
| 3,4-dihydroxyphenylacetic acid + uric acid + ascorbic acid | 0.004 |
| 3,4-dihydroxyphenylpropionic acid + uric acid | 0.010 |
| 3,4-dihydroxyphenylpropionic acid + ascorbic acid | 0.010 |
| 3,4-dihydroxyphenylpropionic acid + uric acid + ascorbic acid | 0.010 |