SMILES: C[C@H]1[C@@H]([C@H]([C@H]([C@@H](O1)O[C@@H]2[C@H]([C@@H](O[C@H]([C@@H]2O)O[C@@H]3[C@H]([C@@H](O[C@@H]([C@H]3O[C@@H]4[C@@H]([C@H]([C@@H]([C@H](O4)CO)O)O)O)CO)O)NC(=O)C)C)O)O[C@H]5[C@@H]([C@@H]([C@H]([C@@H](O5)C)O)OC(=O)C)O)O)O
Description: The molecule is a polysaccharide derivative comprised of a [2)-alpha-L-Rhap(III)-(1->2)-alpha-L-Rhap(II)-(1->3)-alpha-L-Rhap(I)-(1->3)-beta-D-GlcpNAc-(1->] tetrasaccharide repeat modified by the (1->4) linkage of an alpha-D-glucosyl group to the GlcNAc residue and by addition of an acetyl group to either O-3 or O-4 of many of the Rha(III) residues (65% to O-3; 25% to O-4). The structure provided is representative of that in Shigella flexneri serotype 1a and shows the most common repeating unit. It has a role as an antigen.