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- [31] Nitrogen- and sulfur-containing heterocycles.: 49.: Synthesis of derivatives of new heterocyclic systems of 1,2-dioxocyclopenta(hexa)[g]oxazolidino[3,2-f]-pyrimido[4,5-b][1,4]thiazine, 1,2-dioxocyclopenta(hexa)[g]imidazolidino[3,2-f]-pyrimido[4,5-b][1,4]thiazine and 1,2-oxazino[5,4-g]pyrimido[4,5-b][1,4]thiazine KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII, 1999, (01): : 101 - 104
- [37] SYNTHESIS OF PYRIDO[1,2-A]PYRIMIDO[4,5-B]PYRIDINE AND RELATED TRICYCLIC SYSTEMS JOURNAL OF ORGANIC CHEMISTRY, 1971, 36 (15): : 2192 - &