Protocatechuic aldehyde
Encyclopedia
Protocatechuic aldehyde is a phenolic aldehyde
Phenolic aldehyde
Phenolic aldehydes are a type of natural phenol. Phenolics aldehydes can be found in wines and cognacs.Examples :* Hydroxybenzaldehydes* Protocatechuic aldehyde* Vanillin and isovanillin...

, a compound released from cork stopper
Cork (material)
Cork is an impermeable, buoyant material, a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber , which is endemic to southwest Europe and northwest Africa...

s into wine.

This molecule can be used as a precursor in the vanillin
Vanillin
Vanillin is a phenolic aldehyde, an organic compound with the molecular formula C8H8O3. Its functional groups include aldehyde, ether, and phenol. It is the primary component of the extract of the vanilla bean. It is also found in Leptotes bicolor, roasted coffee and the Chinese red pine...

 synthesis by biotransformation by Capsicum frutescens
Capsicum frutescens
Capsicum frutescens is a species of chili pepper that includes the following cultivar and varieties:*Piri piri, also called African Bird's Eye or African devil* Kambuzi pepper, Malawian pepper*Malagueta pepper*Tabasco pepper, used to make Tabasco sauce...

cell cultures.
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