[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an inorganic sodium salt consisting of sodium and chromate ions in a 2:1 ratio. It has a role as a carcinogenic agent, an oxidising agent, a poison and a diagnostic agent. It contains a chromate(2-)."}, {"from": "gpt", "value": "[O-1][Cr][=Branch1][C][=O][=Branch1][C][=O][O-1].[Na+1].[Na+1]"}]