0-22-00-00254 (Beilstein Handbook Reference) 3-Pyridinecarboxylic acid, 1,6-dihydro-4-hydroxy-6-oxo (9CI) 4,6-Dihydroxynicotinic acid 5466-62-6 BRN 0137085 NICOTINIC ACID, 4,6-DIHYDROXY- NSC 25748 NSC 26363