Biologically active heparin-like fragments with a ``non-glycosamino''glycan structure. Part 1: A pentasaccharide containing a 3-O-methyl iduronic acid unit - Jaurand,G.; Basten,J.; Lederman,I.; van Boeckel,A A.C.; Petitou,M. (Bioorg Med Chem Lett, 1992)