You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[(2-methylpropan-2-yl)oxycarbonyl]-3-[(2-methylpropan-2-yl)oxycarbonylamino]piperidine-3-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C16H28N2O6
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