1H-2,3-BENZOXAZINE, 3,4-DIHYDRO-7-NITRO-3-(2-(4-PYRIDYL)ETHYL)-, HYDROCHLORIDE 21038-13-1 7-Nitro-3-(2-(4-pyridyl)ethyl)-3,4-dihydro-1H-2,3-benzoxazine hydrochloride