methyl O-(3,4-di-O-methyl-2,6-di-O-sulfoglucopyranosyl)-1-4-O-(2,3-di-O-methylglucopyranosyluronic acid)-1-4-O-(2,3,6-tri-O-sulfoglucopyranosyl)-1-4-O-(3-O-methyl-2-O-sulfoidopyranosyluronic acid)-(1-4)-3-O-methyl-2,6-di-O-sulfoglucopyranoside