[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a monoatomic monocation obtained from potassium. It has a role as a human metabolite and a cofactor. It is an alkali metal cation, an elemental potassium, a monovalent inorganic cation and a monoatomic monocation."}, {"from": "gpt", "value": "[K+1]"}]