Table 3.
Identification of flavonols oxidation products (only simple aromatic compounds are shown).
| Compound | Structure | Myricetin | Kaempferol | Galangin | Fisetin | Myricitrin | Quercitrin | Rutin |
|---|---|---|---|---|---|---|---|---|
| 1,3,5-Benzenetriol |  |
– | B1 | C1 | – | E1 | – | – |
| 3,4,5-Trihydroxybenzoic acid |  |
A1 | B2 | C2 | – | E2 | – | – |
| 2,4,6-Trihydroxybenzoic acid |  |
A2 | B3 | C3 | – | E3 | – | – |
| 2,4,6-Trihydroxybenzaldehyde |  |
A3 | B5 | C5 | – | – | – | – |
| 4-Hydroxybenzoic acid |  |
– | B4 | – | – | – | – | – |
| Benzoic acid |  |
– | – | C4 | – | – | – | – |
| 3,4-Dihydroxymandelic acid |  |
– | – | – | D1 | – | – | – |
| 3,4 -Dihydroxyphenylglyoxylate |  |
– | – | – | D2 | – | – | – |
| Protocatechuic acid |  |
– | – | – | D3 | – | – | – |
| 2,4-Dihydroxybenzoic acid |  |
– | – | – | D5 | – | – | – |
| 3-Hydroxybenzoic acid |  |
– | – | – | D6 | – | – | – |