13591-47-4 2H-1,3-Oxazine, tetrahydro-5-bromo-3-methyl-5-nitro-, hydrobromide 5-Bromo-3-methyl-5-nitrotetrahydro-2H-1,3-oxazine hydrobromide 5-Bromo-5-nitro-3-methyltetrahydro-1,3-oxazine hydrobromide