28740-72-9 3,4-Dihydropyrrolo(3,2,1-jk)(1,4)benzodiazepine perchlorate (2:1) 4,5-Dihydropyrrolo(3,2,1-jk)(1,4)benzodiazepine hemiperchlorate Pyrrolo(3,2,1-jk)(1,4)benzodiazepine, 3,4-dihydro-, perchlorate (2:1)