O-.BETA.-D-GLUCOPYRANURONOSYL-(1->4)-O-.BETA.-D-GLUCOPYRANOSYL-(1->4)-O-.ALPHA.-D-GLUCOPYRANOSYL-(1->4)-.ALPHA.-D-GALACTOPYRANOSE
o-.beta.-d-glucopyranuronosyl-(1->4)-o-.beta.-d-glucopyranosyl-(1->4)-o-.alpha.-d-glucopyranosyl-(1->4)-.alpha.-d-galactopyranose