[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][O][C@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C][=C][Branch1][Ring2][O][Ring1][=Branch1][C][=Branch1][C][=O][O][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an oligosaccharide sulfate that is 2-acetamido-2-deoxy-3-O-(4-deoxy-alpha-L-threo-hex-4-enopyranuronosyl)-beta-D-galactopyranose in which the hydroxy group at position 2 of the 4-deoxy-hex-4-enopyranuronosyl moiety is converted to the corresponding sulfate derivative. It is functionally related to a beta-D-4-deoxy-Delta(4)-GlcpA-(1->3)-beta-D-GalpNAc. It is a conjugate acid of a 4-deoxy-Delta(4)-beta-D-GlcpA2S-(1->3)-beta-D-GalpNAc(2-)."}]