Synthesis of a pentasaccharide corresponding to the antithrombin III binding fragment of heparin - van Boeckel, C A A; Beetz, T; Vos, J N; de Jong, A J M; van Aelst, S F; van der Bosch, R H; Mertens, J M R; van der Vlugt, F A (J Carbohydr Chem, 1985)