1-(2-Morpholinoethyl)-3-methylpyrido(3,4-b)pyrazin-2(1H)-one 86004-87-7 Pyrido(2,3-b)pyrazin-3(4H)-one, 2-methyl-4-(2-(4-morpholinyl)ethyl)- Pyrido(3,4-b)pyrazin-2(1H)-one, 1-(2-morpholinoethyl)-3-methyl-