[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an ammonium salt consisting of ammonium and oxalate ions in a 2:1 ratio. It is an ammonium salt and an oxalate salt. It contains an oxalate(2-)."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O-1].[NH4+1].[NH4+1]"}]