3(2H)-Pyridazinone, 6-hydroxy-, isobutoxycarboxylate 4-25-00-00025 (Beilstein Handbook Reference) 6-Hydroxy-3(2H)-pyridazinone isobutoxycarboxylate 74037-36-8 BRN 0198370 Isobutyl 2,3-dihydro-3-oxo-6-pyridazinyl carbonate