Table 1.
Classification of phenolic compounds in plants [24].
| Structure | Phenolic Class |
|---|---|
| C6 | Simple phenolics |
| C6-C1 | Phenolic acids and related compounds |
| C6-C2 | Acetophenones and phenylacetic acids |
| C6-C3 | Cinnamic acids, cinnamyl aldehydes/alcohols |
| C6-C3 | Coumarins, isocoumarins, chromones |
| C6-C1-C6 | Benzophenones, xanthones |
| C6-C2-C6 | Stilbenes |
| C6-C3-C6 | Chalcones, aurones, dihydrochalcones |
| C6-C3-C6 | Flavones |
| C6-C3-C6 | Flavonols |
| C6-C3-C6 | Flavanones |
| C6-C3-C6 | Flavanonols |
| C6-C3-C6 | Flavan-3-ols |
| C6-C3-C6 | Isoflavonoids |
| C6-C3-C6 | Anthocyanidins/Anthocyanins |
| (C6-C3-C6)2 | Biflavonoids |
| C6,C10,C14 | Benzoquinones, naphthaquinones, anthraquinones |
| C18 | Betacyanins |
| Lignans, neolignans | Dimers or oligomers |
| Lignin | Polymers |
| Phlobaphenes | Polymers |