1H-1,2,3-Triazole-4-carboxylic acid, 5-(4-pyridinylamino)- 5-(4-Pyridinylamino)-1H-1,2,3-triazole-4-carboxylic acid 5-26-10-00249 (Beilstein Handbook Reference) 70292-34-1 BRN 0528411