14228-23-0 2-(4-Pyridyl)cinchoninic acid 2-(4-Pyridyl)cinchoninsaeure [German] 4-Quinolinecarboxylic acid, 2-(4-pyridinyl)- 5-25-05-00236 (Beilstein Handbook Reference) BRN 0017972 CINCHONINIC ACID, 2-(4-PYRIDYL)- Kyselin 2-(4-pyridyl)-cinchoninova [Czech] NSC 360211