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-[(2R,3R,6R)-6-[2-(ethylamino)-2-oxoethyl]-2-(hydroxymethyl)-3,6-dihydro-2H-pyran-3-yl]oxane-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C16H26N2O5
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