glycoproteins were investigated in different types of biliary calculi by a methanolysis procedure of the carbohydrate moiety , the formation of 2,6-dinitro-4-trifluoromethylbenzenesulphonate derivatives of n-acetylhexosamines and n-acetylneuraminic acid , followed by separation , identification and quantification of the liberated monosaccharides using capillary gas-liquid chromatography .
C0007004
carbohydrate
C0026492
monosaccharides