[{"from": "human", "value": "Create a molecule with the structure as the one described. Glycoprotein marker of gastrointestinal cancer."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N].[C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N].[Zn+2]"}]