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Ullah, M.; Ahmed, M.; Romman, U.; Akhter, K.; Ahmed, S.; Halim, M. Synthesis Of 5, 7-Diaryl-1,5-Dihydro (Or 1, 2, 3, 5-Tetrahydro)- Pyrano[2, 3-D] Pyrimidin-2, 4-Diones (Or 2-Thioxo-4-Ones). JBCS 2013, 25, 124-131.