6-O-methyl-1,2,3,4-di-O-isopropylidene-D-galactopyranose

1-O,2-O:3-O,4-O-Diisopropylidene-6-O-methyl-α-D-galactopyranose

6-O-Methyl-1-O,2-O:3-O,4-O-bis(1-methylethylidene)-α-D-galactopyranose