[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a nitrate of potassium. It is used as an oxidizing component of gunpowder, a preservative, a fertilizer, and can also be found in some toothpastes. Nitrite is a toxic compound known to cause methemoglobinemia. (L1137,  L1634)"}, {"from": "gpt", "value": "[N+1][=Branch1][C][=O][Branch1][C][O-1][O-1].[K+1]"}]