2-Carboxypyridine 2-Pyridinecarboxylic acid 5-22-02-00003 (Beilstein Handbook Reference) 57665-05-1 636-80-6 98-98-6 AI3-19242 Acide picolique [French] BRN 0109595 EINECS 202-719-7 NSC 171 NSC 21209 PICOLINIC ACID Pyridine-carboxylique-2 [French] alpha-Pyridinecarboxylic acid o-Pyridinecarboxylic acid