(sodium-2-acetamido-2-deoxy-4-O-sulfonato-beta-D-galactopyranosyl)-(1-4)-(sodium 2-O-sulfonato-L-idopyran)uronate
(sodium-2-acetamido-2-deoxy-4-o-sulfonato-beta-d-galactopyranosyl)-(1-4)-(sodium 2-o-sulfonato-l-idopyran)uronate