4)-O-β-D-glucopyranuronosyl-(1→4)-O-2-eoxy-3,6-di-O-sulfo-2- (sulfoamino)-α-D-glucopyranosyl-(1→4)-O-2-O-sulfo-α-L-idopyranouronosyl-(1→ 4)-O-methyl-2-deoxy-6-O-sulfo-2-(sulfoamino)-α-D-glucopyranoside, decasodium salt.