4-(Trifluoromethyl)benzene-1-sulfonyl chloride Glucosamine PHENYL-N-ACETYL-BETA-D-GLUCOSAMINIDE 4-Nitrophenyl2-acetamido-3,6-di-O-acety-2-deoxyl-b-D-glucopyranoside 4-Nitrophenyl2-acetamido-3,6-di-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-b-D-galactopyranosyl)-2-deoxy-b-D-glucopyranoside 4-Nitrophenyl2-acetamido-2-deoxy-3-O-[2-O-(a-L-fucopyranosyl)-b-D-galactopyranosyl]-b-D-glucopyranoside