You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(4-iodo-3,5-dimethylpyrazol-1-yl)phenyl]ethyl N-(4-methylphenyl)sulfonylcarbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H22IN3O4S
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