You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[(2R,3S)-3-(4-chlorophenyl)-1-(4-methylphenyl)sulfonylaziridin-2-yl]-2,2-dimethylpropan-1-one into its molecular formula.
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C20H22ClNO3S
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