Flavones[edit]
Flavones are divided into four groups:[1]
| Group | Skeleton | Examples | |||
|---|---|---|---|---|---|
| Description | Functional groups | Structural formula | |||
| 3-hydroxyl | 2,3-dihydro | ||||
| Flavone | 2-phenylchromen-4-one |  |
|
 |
Luteolin, Apigenin, Tangeritin |
| Flavonol or 3-hydroxyflavone |
3-hydroxy-2-phenylchromen-4-one |  |
|
Quercetin, Kaempferol, Myricetin, Fisetin, Isorhamnetin, Pachypodol, Rhamnazin | |
| Flavanone | 2,3-dihydro-2-phenylchromen-4-one | |
|
Hesperetin, Naringenin, Eriodictyol, Homoeriodictyol | |
| Flavanonol or 3-Hydroxyflavanone or 2,3-dihydroflavonol |
3-hydroxy-2,3-dihydro-2-phenylchromen-4-one | |
|
Taxifolin (or Dihydroquercetin), Dihydrokaempferol | |