13591-48-5 2H-1,3-Oxazine, tetrahydro-5-bromo-3-ethyl-5-nitro-, hydrochloride 5-Bromo-3-ethyl-5-nitrotetrahydro-2H-1,3-oxazine hydrochloride 5-Bromo-5-nitro-3-ethyltetrahydro-1,3-oxazine hydrochloride