[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][=Branch1][=Branch1][C][C@@][Branch2][Branch1][=Branch2][O][C@H1][Ring1][=Branch1][C@@H1][Branch2][Ring2][S][C@@H1][Branch2][Ring2][O][C][O][C@@][Branch2][Ring1][S][C][C@@H1][Branch2][Ring1][#Branch2][C@H1][Branch1][P][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C@@H1][Branch1][#Branch1][C@@H1][Branch1][Ring1][C][O][O][O][N][C][=Branch1][C][=O][C][O][C][=Branch1][C][=O][O][O][O][Branch1][=Branch1][C][=Branch1][C][=O][O][O][O]"}, {"from": "gpt", "value": "The molecule is an amino disaccharide consisting of two alpha(2->9)-linked sialic acid units; corresponds to the repeating unit in the group C polysaccharide of Neisseria meningitidis (MenC). It is an amino disaccharide, a member of acetamides and a dicarboxylic acid."}]