A series of 1, 2, 3-triazole (2), pyrazole (3 and 5), and pyrrole (4) ribonucleosides with two adjacent carbamoyl groups have been synthesized and evaluated for cell growth inhibition and induction of cellular differentiation of HL-60 cells in culture. Glycosylation of the TMS derivatives of dimethyl 1, 2, 3-triazole-4, 5-dicarboxylate(6) and diethyl pyrazole-3, 4- dicarboxylate (7) with 1-0-acetyl-2, 3, 5-tri-O-benzoyl-~-ribofuranose (8) in the presence of ...