4-(3-amino-3,4-dihydro-2H-pyrano[3,2-b]pyridin-7-yl)-6-(methyloxy)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one
6-(methyloxy)-4-(3-{[(phenylmethyl)oxy]amino}-3,4-dihydro-2H-pyrano[3,2-b]pyridin-7-yl)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one
6-(methyloxy)-4-(3-{[(phenylmethyl)oxy]amino}-3,4-dihydro-2H-pyrano[3,2-b]pyridin-7-yl)pyrido[2,3-b]pyrazin-3(4H)-one