After the discovery of a unique pentasaccharide domain in heparin that
is responsible for activation of antithrombin III, many analogues hav
e been synthesised which stimulate the inhibition of factor Xa. Some a
spects of the synthesis of heparin like pentasaccharides are presented
. Furthermore, pentasaccharide conjugates could be designed and synthe
sised which stimulate the antithrombin III mediated inhibition of both
factor Xa and thrombin.