28740-73-0 3,4-Dihydropyrrolo(1,2,3-ef)(1,5)benzodiazepin-2(1H)-one 4,5-Dihydropyrrolo(1,2,3-ef)(1,5)benzodiazepin-6(7H)-one 5-24-03-00502 (Beilstein Handbook Reference) BRN 0648293 Pyrrolo(1,2,3-ef)(1,5)benzodiazepin-2(1H)-one, 3,4-dihydro-