Synonyms: 2-Piperazino-4-(1',1'-dioxide-thiomorpholino)pyrido(2,3-d)pyrimidine dihydrochloride;4-(1,1-dioxidothiomorpholin-4-yl)-2-(piperazin-1-yl)pyrido[3,2-d]pyrimidine dihydrochloride;Pyrido(3,2-d)pyrimidine, 2-(1-piperazinyl)-4-(4-thiomorpholinyl)-, S,S-dioxide, dihydrochloride;AC1L53AP;AC1Q6Z5N;AR-1F5509;LS-134144;4-(2-piperazin-1-ylpyrido[3,2-d]pyrimidin-4-yl)-1,4-thiazinane 1,1-dioxide dihydrochloride