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 3-[5-(2-phenylethyl)-1,3,4-oxadiazol-2-yl]-1-(4-pyridin-4-ylpiperidin-1-yl)propan-1-one .
user
C23H26N4O2
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