[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the potassium salt of L-tartaric acid. It contains a L-tartrate(2-)."}, {"from": "gpt", "value": "[C@@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O].[K+1].[K+1]"}]