ATC (Anatomical Therapeutic Chemical Classification) N05CD09 CAS registry number (Chemical Abstracts Service) 0057801-81-7 Chemical Formula C15-H10-Br-Cl-N4-S Molecular Weight 393 Therapeutic Categories Benzodiazepine derivative Hypnotic and sedative agent Chemical Name 2-bromo-4-(o-chlorophenyl)-9-metyl-6H-tieno[3,2-f]-s-triazolo[4,3-a]-[1,4]diazepine (WHO)