84379-13-5 9H-Imidazo(1,5-a)pyrrolo(2,1-c)(1,4)benzodiazepine-1-carboxylic acid, 8-bromo-11,12,13,13a-tetrahydro-9-oxo-, 1,1-dimethylethyl ester, (S)- BRN 4765855 Bretazenil Bretazenil [USAN:INN] Bretazenilum [INN-Latin] Ro 16-6028 tert-Butyl (S)-8-bromo-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo(1,5-a)pyrrolo(2,1-c)(1,4)benzodiazepine-1-carboxylate