2H-Indeno(1,2-c)pyridazine-7-carbonitrile, 3,4,4a,5-tetrahydro-3-oxo- 3-Oxo-3,4,4a,5-tetrahydro-2H-indeno(1,2-c)pyridazine-7-carbonitrile 69099-76-9 7-Ciano-4,4a-diidro-5H-indeno(1,2-c)piridazin-3-one [Italian] BRN 0917670