3,4-Dihydroxybenzaldehyde

3,4-Dihydroxybenzaldehyde, also known as protocatechuic aldehyde, is a phenolic aldehyde, a compound released from cork stoppers into wine.^[1] It is an isomer of 2,4-dihydroxybenzaldehyde.

Quick facts Names, Identifiers ...

3,4-Dihydroxybenzaldehyde

Names
Preferred IUPAC name 3,4-Dihydroxybenzaldehyde
Other names Protocatechuic aldehyde Protocatechualdehyde Rancinamycin IV
Identifiers
CAS Number	139-85-5 Y
3D model (JSmol)	Interactive image
Beilstein Reference	774381
ChEBI	CHEBI:50205
ChEMBL	ChEMBL222021 Y
ChemSpider	8438 Y
DrugBank	DB11268
ECHA InfoCard	100.004.889
EC Number	205-377-7
Gmelin Reference	123001
KEGG	C16700 Y
PubChem CID	8768
UNII	4PVP2HCH4T Y
CompTox Dashboard (EPA)	DTXSID4074512
InChI InChI=1S/C7H6O3/c8-4-5-1-2-6(9)7(10)3-5/h1-4,9-10H N Key: IBGBGRVKPALMCQ-UHFFFAOYSA-N N InChI=1/C7H6O3/c8-4-5-1-2-6(9)7(10)3-5/h1-4,9-10H Key: IBGBGRVKPALMCQ-UHFFFAOYAN
SMILES C1=CC(=C(C=C1C=O)O)O
Properties
Chemical formula	C7H6O3
Molar mass	138.12 g/mol
Related compounds
Related compounds	2,4-Dihydroxybenzaldehyde
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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This molecule can be used as a precursor in the vanillin synthesis by biotransformation by cell cultures of Capsicum frutescens, a type of Chili pepper.^[2] It is also found in the mushroom Phellinus linteus.^[3]