4H-Imidazo(1,5-a)(1,4)benzodiazepine-3-carboxylic acid, 8-chloro-5,6-dihydro-5-methyl-6-oxo-, ethyl ester 78756-33-9 Ethyl 8-chloro-5,6-dihydro-5-methyl-6-oxo-4H-imidazo(1,5-a)(1,4)benzodiazepine-3-carboxylate RO-15-3505 Ro 15-3505