You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[(1R,2R)-2-ethylcyclopropyl]-2,2,2-trifluoro-N-(5-oxa-2-azaspiro[3.5]nonan-8-yl)acetamide .
user
C14H21F3N2O2
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