the methyl and 1-octyl beta-glycosides of the p-antigen tetrasaccharide [ globotetraose , beta-d-galpnac- ( 1 -- -- 3 ) -alpha-d-galp- ( 1 -- -- 4 ) -beta-d-galp- ( 1 -- -- 4 ) -d-glc ] were synthesised from a tetrasaccharide precursor , prepared using methyl disaccharide 1-thioglycosides as intermediates .
C0017977
glycosides
C0039901
thioglycosides