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 [4-[[3-(2,4-difluorophenyl)-1,2-oxazol-5-yl]methyl]oxan-4-yl]-pyrrolidin-1-ylmethanone .
user
C20H22F2N2O3
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