6-O-[6-O-(2-O,3-O,4-O,6-O-Tetramethyl-β-D-galactopyranosyl)-2-O,3-O,4-O-trimethyl-β-D-galactopyranosyl]-1-O,2-O,3-O,4-O,5-O-pentamethyl-D-galactitol