4H-1,4-BENZOXAZIN-3-ONE, 2,3-DIHYDRO-6-CHLORO-4-(2-(DIMETHYLAMINO)PROPYL)-2-ETHY 4H-1,4-Benzoxazin-3-one, 2,3-dihydro-6-chloro-4-(2-(dimethylamino)propyl)-2-ethyl-, oxalate 57462-84-7