139886-73-0 2-(p-Trifluoroacetamidophenyl)ethyl O-alpha-D-galactopyranosyl-(1-4)-O-beta-D-galactopyranosyl-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoside 2-(p-Trifluoroacetamidophenyl)ethyl O-galactopyranosyl-(1-4)-O-galactopyranosyl-(1-4)-2-acetamido-2-deoxy-glucopyranoside Teggag