SMILES: C[C@H]1[C@@H]([C@H]([C@H]([C@H](O1)O[C@@H]2[C@@H]([C@H]([C@@H](O[C@@H]2C(=O)O)O[C@@H]3[C@H]([C@@H](O[C@@H]([C@@H]3O)CO)O)NC(=O)C)OC(=O)C)O)O[C@H]4[C@@H]([C@@H]([C@H]([C@@H](O4)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)-beta-D-GalpA-(1->3)-beta-D-GalpNAc-(1->] tetrasaccharide repeat modified by the addition of an acetyl group to either O-3 or O-4 of many of the Rha(III) residues (60% to O-3; 30% to O-4). The structure provided is representative of that in Shigella flexneri serotype 6 and shows the most common repeating unit. It has a role as an antigen.