the presence of galactose , mannose , fucose , glucose , sialic acid , n-acetylgalactosamine , n-acetylglucosamine and sialic acid substituted o-glycosidic linked beta-d-galactopyranosyl ( 1 leads to 3 ) n-acetyl-d-galactosamine was confirmed on membrane glycoconjugates by gas chromatography .
C0001055
n-acetylgalactosamine
C0016943
galactosamine