methyl 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranosyl-(1->4)-beta-D-glucopyranuronosyl-(1->4)-2-deoxy-3,6-di-O-sulfo-2-(sulfoamino)-D-glucopyranosyl-(1->4)-2-O-sulfo-alpha-L-idopyranuronosyl-(1->4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopy