N-and C-substituted monosaccharides, incluing their hetaryl derivatives, have found rather extensive application in clinlcal practlce as inhlbltors of nucleic acldmetabollsmwlth anticancer, antivirus, and immunodepressant activity [16]. C-Hetaryl-substituted carbohydrates [5], among which derivatives with anticoagulant [6], antimicrobial [8], and neurotropic activity [8] have been discovered, are of particular interest as a consequence ...