2H-1,4-Benzoxazin-3(4H)-one, 6-chloro-4-(2-(4-morpholinyl)ethyl)-2-phenyl-, monohydrochloride 57462-73-4 6-Chloro-4-(2-(4-morpholinyl)ethyl)-2-phenyl-2H-1,4-benzoxazin-3(4H)-one monohydrochloride