[{"from": "human", "value": "Provide a description of this molecule. [C][Branch2][Ring2][=C][C@@H1][C@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][NH3+1][O][O][C@H1][C@@H1][Branch2][Ring1][Ring2][C@H1][Branch1][S][C@@H1][Branch1][N][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a zwitterion derived from heparosan L-iduronic acid. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a tautomer of a heparosan L-iduronic acid."}]