[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a transition metal with a molar mass of 54.94g/mol. Manganese is considered critical for human health, and plays important roles in development, metabolism, and the antioxidant system. That said, excessive manganese intake is associated with manganism, a neurodegenerative disorder that causes dopaminergic neuronal death and parkinsonian-like symptoms."}, {"from": "gpt", "value": "[Mn+2]"}]