[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N].[C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N].[Zn+2]"}, {"from": "gpt", "value": "Glycoprotein marker of gastrointestinal cancer."}]