2H-1,4-Benzoxazin-3(4H)-one, 6-chloro-2-methyl-4-(2-(4-morpholinyl)ethyl)-, monohydrochloride 57462-69-8 6-Chloro-2-methyl-4-(2-(4-morpholinyl)ethyl)-2H-1,4-benzoxazin-3(4H)-one monohydrochloride