from the results of methylation analysis , mass spectrometry and chromium trioxide oxidation , the main oligosaccharide unit was determined to be a linear trisaccharide ( 85 % by weight ) , neungc alpha ( 2 -- -- 3 ) gal beta ( 1 -- -- 3 ) galnacol .
C0028959
oligosaccharide
C0041102
trisaccharide