You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[[(8R)-2-(3-methylfuran-2-carbonyl)-5-oxa-2-azaspiro[3.5]nonan-8-yl]oxy]-1-pyrrolidin-1-ylethanone into its molecular formula.
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C19H26N2O5
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