A novel class of oligomeric compounds designed for forming conjugates with biologically active substances and delivering these substances to a desired bodily target are disclosed. Novel conjugates of these oligomeric compounds and biologically active moieties, pharmaceutical compositions containing such conjugates, and uses thereof as delivery systems for delivering the biologically active substances to a desired target are further disclosed. Processes of preparing the conjugates and the oligomeric compounds and novel intermediates designed for and used in these processes are also disclosed.