Table 2.
Structures of phenolic acids.
| |||
|---|---|---|---|
| Name | 3 | 4 | 5 |
| Benzoic acid | |||
| Gallic acid | OH | OH | OH |
| Protocatechuic acid | OH | OH | H |
| Vanillic acid | OCH3 | OH | H |
| Cinnamic acid | |||
| Caffeic acid | OH | OH | H |
| Ferulic acid | OCH3 | OH | H |
| p-Coumaric acid | H | OH | H |
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