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Isoindolo[1′,2′:2,3]pyrido[3″,2″:4′,5′]thieno[3′,2′: 4,5]-pyrimido[1,6-a]benzimidazol-8(12bH)-one. A novel polycondensed heterocyclic system

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Synthesis of novel heterocyclic system-imidazo[5,1-b][1,3]benzoxazine

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¹H and ¹³C NMR Spectra of 9H-Pyrimido[4,5-b]indoles

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Condensed isoquinolines. 35*. Synthesis and reactions of 4h-thieno[3′,4′:5,6]pyrimido-[1,2-b]isoquinoline-4,11(5H)-dione

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