2-Methyl-2,3-dihydro-5H-indeno(1,2-c)pyridazin-3-one 2-Metil-5H-indeno(1,2-c)piridazin-3-one [Italian] 5-24-04-00013 (Beilstein Handbook Reference) 5H-Indeno(1,2-c)pyridazin-3-one, 2,3-dihydro-2-methyl- 69581-18-6 BRN 0786399