117903-08-9 5-(p-Acetylaminophenyl)-6-methyl-4,5-dihydro-3(2H)-pyridazinone Acetamide, N-(4-(1,4,5,6-tetrahydro-3-methyl-6-oxo-4-pyridazinyl)phenyl)- N-(4-(1,4,5,6-Tetrahydro-3-methyl-6-oxo-4-pyridazinyl)phenyl)acetamide