You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[3-[5-[(4-fluorophenyl)methylsulfonyl]-1,3,4-oxadiazol-2-yl]propyl]benzamide by IUPAC nomenclature, provide its molecular formula.
user
C19H18FN3O4S
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