[3)-beta-D-Manp4,NAc2A-(1->3)-alpha-L-FucpNAc-(1->3)-alpha-D-FucpNAc-(1->]n
[3)-beta-d-manp4,nac2a-(1->3)-alpha-l-fucpnac-(1->3)-alpha-d-fucpnac-(1->]n
A polysaccharide derivative comprising a trisaccharide repeating unit consisting of 4,<em>N</em>-diacetyl-β-<small>D</small>-mannosaminouronic acid, <em>N</em>-acetyl-α-<small>L</small>-fucosamine and <em>N</em>-acetyl-β-<small>D</small>-fucosamine residues linked sequentially (1→3), with the trisaccharide repeats themselves also being linked (1→3); corresponds to the serotype 8 (CP8) capsular polysaccharide of <em>Staphylococcus aureus</em>.