You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule tert-butyl N-[(1S,2S,3R)-1-(aminomethyl)-2-(benzenesulfonyl)-3-(4-chlorophenyl)cyclopropyl]carbamate into molecular formula.
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C21H25ClN2O4S
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