[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch1][Ring1][C][O][C@H1][C@H1][Branch2][Ring1][P][C@@H1][Branch1][N][C@@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][C@H1][C@@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a polysaccharide composed of a backbone of alpha-L-arabinofuranosyl-(1->3)-6-deoxy-alpha-L-gulo-heptopyranosyl repeating units that are joined to each other via (1->3)-linkages."}]