4H-Imidazo(1,5-a)(1,4)benzodiazepine-3-carboxylic acid, 8-azido-5,6-dihydro-5-methyl-6-oxo-, ethyl ester 91917-65-6 Ethyl-8-azido-5,6-dihydro-5-methyl-6-oxo-4H-imidazo-1,4-benzodiazepine-3-carboxylate RO-154513 Ro 15-4513