2-Butyl-2,3,4,4a-tetrahydro-5H-indeno(1,2-c)pyridazin-3-one 5-24-03-00497 (Beilstein Handbook Reference) 5H-Indeno(1,2-c)pyridazin-3-one, 2,3,4,4a-tetrahydro-2-butyl- 69099-79-2 BRN 0795527