114915-69-4 9-Acetylamino-4,4a-dihydro-5H-indeno(1,2-c)pyridazin-3-one Acetamide, N-(3,4,4a,5-tetrahydro-3-oxo-2H-indeno(1,2-c)pyridazin-9-yl)- N-(3,4,4a,5-Tetrahydro-3-oxo-2H-indeno(1,2-c)pyridazin-9-yl)acetamide