for the following products
Methyl 2-acetamido-2-deoxy alpha-D-galactopyranoside | Methyl N-acetyl-2-deoxy-α-D-galactosamine | N-((2S,3R,4R,5R,6R)-4,5-Dihydroxy-6-(hydroxymethyl)-2-methoxytetrahydro-2H-pyran-3-yl)acetamide and O-Methyl-N-acetyl-2-deoxy-alpha-D-galactosamine
