[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an inorganic chloride composed of rubidium and chloride ions in a 1:1 ratio. It has a role as an antidepressant and a biomarker. It is a rubidium molecular entity and an inorganic chloride."}, {"from": "gpt", "value": "[Cl-1].[Rb+1]"}]