117903-09-0 5-(p-Acetylaminophenyl)-6-methyl-3(2H)-pyridazinone Acetamide, N-(4-(1,6-dihydro-3-methyl-6-oxo-4-pyridazinyl)phenyl)- N-(4-(1,6-Dihydro-3-methyl-6-oxo-pyridazinyl)phenyl)acetamide