SMILES: CC(=O)N[C@@H]1[C@H]([C@H]([C@H](O[C@@H]1O)CO)O[C@H]2[C@@H]([C@H]([C@H]([C@H](O2)CO)O)O)NC(=O)C)O
Description: The molecule is an amino disaccharide consisting of N-acetyl-alpha-D-galactosamine having an N-acetyl-D-galactosaminyl residue attached at the 4-position via a beta-linkage. Important epitope forming part of the O-polysaccharides of some Gram-negative bacteria. It has a role as an epitope.