Phenolic aldehyde
Phenolic aldehydes are derivatives of phenol. Phenolic aldehydes can be found in wines and cognacs.
Examples :
- Hydroxybenzaldehydes
- Dihydroxybenzaldehydes
- Vanillin and isovanillin
- 2,3,4-trihydroxybenzaldehyde can be isolated from Antigonon leptopus.