(3-(ethoxycarbonyl)-5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepin-8-yl)(3-methoxyphenyl)iodonium tosylate

ethyl 5,6-dihydro-5-methyl-6-oxo-8-tributylstannyl-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate