[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a soluble salt of potassium and the dihydrogen phosphate ion.  It is a source of phosphorus and potassium as well as a buffering agent. It can be used in fertilizer mixtures to reduce escape of ammonia by keeping pH low."}, {"from": "gpt", "value": "[O][P][=Branch1][C][=O][Branch1][C][O][O-1].[K+1]"}]