preferred_name: O-.ALPHA.-D-GALACTOPYRANOSYL-(1->2)-O-(.BETA.-D-GALACTOPYRANOSYL-(1->3))-O-.ALPHA.-D-GALACTOPYRANOSYL-(1->3)-O-.BETA.-D-GALACTOFURANOSYL-(1->3)-O-.BETA.-D-GLUCOPYRANOSYL-(1->5)-.BETA.-D-GALACTOFURANOSE