[{"from": "human", "value": "Provide a description of this molecule. [C][C@@H1][C@H1][Branch2][Ring2][Branch2][C@@H1][Branch2][Ring2][Ring1][C@@H1][Branch1][Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][O][C@@H1][C@H1][Branch2][Ring1][C][C@H1][Branch1][=C][C@@H1][Branch1][Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][N][C][=O][O][O][O][N][C][=O]"}, {"from": "gpt", "value": "The molecule is an amino disaccharide epitope consisting of two N-formyl-alpha-D-perosamine residues linked (1->2). Its coupling with the carrier protein CRM197 via the DAS linker results in a neoglycoconjugate which has been used in investigations into vaccine development against brucellosis. It has a role as an epitope."}]