You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(5S)-2-(furan-2-ylmethyl)-7-oxa-2,10-diazaspiro[4.6]undecan-10-yl]-[(2R)-oxolan-2-yl]methanone into its molecular formula.
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C18H26N2O4
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