You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-1-[4-(4-fluorophenyl)sulfonylpiperazin-1-yl]-2-(4-methylphenyl)sulfanylpropan-1-one into molecular formula.
user
C20H23FN2O3S2
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