3-(2-oxo-2H-pyrido[1,2-a]pyrimidin-3-yl)-2(1H)-quinoxalinone
3-(3-oxo-4H-quinoxalin-2-yl)-5H-pyrido[1,2-a]pyrimidin-2-one 3-(3-keto-4H-quinoxalin-2-yl)pyrido[1,2-a]pyrimidin-2-one 3-(3-oxo-4H-quinoxalin-2-yl)pyrido[1,2-a]pyrimidin-2-one
3-(3-oxo-4H-chinoxalin-2-yl)pyrido[1,2-a]pyrimidin-2-on 3-(3-オキソ-4H-キノキサリン-2-イル)ピリド[1,2-a]ピリミジン-2-オン
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