You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[3-[9-[3-(methylamino)propyl]-2,4,8,10-tetraoxaspiro[5.5]undecan-3-yl]propyl]acetamide by IUPAC nomenclature, provide its molecular formula.
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C16H30N2O5
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