Capillary electrophoresis of the enzymatic digests as well as one- and two-dimensional 500 MHz 1H-NMR spectroscopy demonstrated that these hexasacchrides share the common core saccharide structure GlcA beta 1-3GalNAc beta 1-4 GlcA beta 1-3GalNAc beta 1-4GlcA beta 1-3GalNAc with three, four, or five sulfate groups in different combinations.