You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-1-(3-chlorophenyl)-2-[[5-(2-fluorophenyl)-1,3,4-oxadiazol-2-yl]sulfanyl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H12ClFN2O2S
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