Wikipedia:  

3,4-Dihydroxybenzoic acid

Protocatechuic acid; 3,4-DIHYDROXYBENZOATE; 3,4-Dihydroxybenzoic acid; Protocatechuate; 3,4-Dihydroxybenzoate; DHB; protocatechuic acid; 3,4-dihydrobenzoic acid; protocatechuate
Molecular Formula
C7 H6 O4
Natural Isotopic Abundance Mass
154.12014
Mono-Isotopic Molecular Masses
C12N14:   154.026608681
C13N14:   161.0500925456
C12N15:   154.026608681
C13N15:   161.0500925456
3,4-Dihydroxybenzoic acid image
3,4-Dihydroxybenzoic acid
InCHi String:
InChI=1S/C7H6O4/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,8-9H,(H,10,11)

canonical and isomeric SMILES:
C1=CC(=C(C=C1C(=O)O)O)O


PUBCHEM iupac NAME: PUBCHEM iupac TRADITIONAL NAME: PUBCHEM iupac OPENEYE NAME: PUBCHEM iupac CAS NAME: PUBCHEM iupac SYSTEMATIC NAME
3,4-dihydroxybenzoic acid



PubChem Substance (SID):   85165128   24863405   7993687
PubChem Compound (CID):   72
KEGG: Compound ID   C00230
CAS Registry IDs:   99-50-3
PDB Chemical Component   DHB
Miscellaneous Databases and IDs:   ChemSpider 13841226   EPA DSSTox 1212   CambridgeSoft Corporation 8090   Sigma-Aldrich 37580_FLUKA   MMDB 7143.20

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.