pyridinemonocarboxylic acid isonicotinic acid 4-carboxypyridine 4-pyridinecarboxylic acid A pyridinemonocarboxylic acid that has formula C6H5NO2. Beilstein:109599 C6H5NO2 CHEBI:6032 ChemIDplus:55-22-1 Gmelin:68876 InChI=1S/C6H5NO2/c8-6(9)5-1-3-7-4-2-5/h1-4H,(H,8,9) InChIKey=TWBYWOBDOCUKOW-UHFFFAOYSA-N Isonicotinic acid KEGG COMPOUND:55-22-1 KEGG COMPOUND:C07446 NIST Chemistry WebBook:55-22-1 OC(=O)c1ccncc1 Wikipedia:Isonicotinic_Acid gamma-picolinic acid gamma-pyridinecarboxylic acid isonicotinic acid p-pyridinecarboxylic acid pyridine-4-carboxylic acid