3-(2-tert-Butoxycarbonyl-1-hydrazino)-6-(3,5-dimethyl-4-amino-1-pyrazolyl)pyridazine 5-25-17-00459 (Beilstein Handbook Reference) 70589-32-1 BRN 0844356 Hydrazinecarboxylic acid, 2-(6-(4-amino-3,5-dimethyl-1H-pyrazol-1-yl)-3-pyridazinyl)-, 1,1-dimethylethyl ester