3,4-Dihydro-pyrrolo(4,3,2-de)isoquinolin-5(1H)-one 1-methylethylidene hydrazone 5-(Isopropylidinehydrazino)-1,3-dihydropyrrolo(4,3,2-de)isoquinoline 57280-97-4 BRN 0960007 Pyrrolo(4,3,2-de)isoquinolin-5(1H)-one, 3,4-dihydro-, (1-methylethylidene)hydrazone