62538-89-0 9H-Dibenz(b,f)imidazo(1,2-d)(1,4)diazepine, 9-acetyl-6-chloro-3-methyl- Acetyl-9 chloro-6 methyl-3 9H-imidazo(1,2-d)dibenzo(b,f)diazepine-1,4 [French]