[{"from": "human", "value": "Could you provide a description of this molecule? [C][C@H1][Branch2][=Branch1][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C@@H1][C@@H1][Branch2][Ring2][#C][C@@H1][Branch2][Ring2][Branch1][C@H1][Branch2][Ring1][S][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@H1][Branch1][#C][C@@H1][Branch1][O][O][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][C][O][O][N][C][=Branch1][C][=O][C][O][O][C][=Branch1][C][=O][C][O][O]"}, {"from": "gpt", "value": "The molecule is an L-threonine derivative in which L-threonine is linked via its nitrogen to C-6 of the non-reducing-end galactose residue of 3-O-acetyl-alpha-D-galacto-hexodialdo-1,5-pyranosyl-(1->3)-N-acetyl-acetamido-2-deoxy-beta-D-galactosamine; an important threonine-containing epitope of the Proteus penneri O-specific polysaccharide. It has a role as an epitope. It is an amino disaccharide and a L-threonine derivative."}]