[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a hydrate that is the hexahydrate of nickel sulfate. It has a role as a sensitiser. It contains a nickel sulfate."}, {"from": "gpt", "value": "[O].[O].[O].[O].[O].[O].[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Ni+2]"}]