2H-Pyrido(3,2-b)-1,4-oxazin-3(4H)-one, 4-(2-(diethylamino)ethyl)-2-methyl- 4-(2-(Diethylamino)ethyl)-2-methyl-2H-pyrido(3,2-b)-1,4-oxazin-3(4H)-one 86267-39-2