[{"from": "human", "value": "Please give me some details about this molecule. [C@@H1][Branch2][Ring2][#C][C@H1][Branch2][Ring2][#Branch2][C@H1][Branch2][Ring1][P][O][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C@@H1][C@@H1][Branch2][Ring1][C][C@H1][Branch1][=C][C@H1][Branch1][#Branch2][O][C@@H1][Ring1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O][C][=Branch1][C][=O][O-1][O][O]"}, {"from": "gpt", "value": "The molecule is an alpha-D-GalpA-(1->4)-D-GalpA(2-) in which both galacturonate units have alpha-D configuration. It is a conjugate base of an alpha-D-GalpA-(1->4)-alpha-D-GalpA."}]