2H-Pyrido(3,2-b)-1,4-oxazin-3(4H)-one, 4-(2-(dimethylamino)ethyl)-2-phenyl- 4-(2-(Dimethylamino)ethyl)-2-phenyl-2H-pyrido(3,2-b)-1,4-oxazin-3(4H)-one 86267-50-7