You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-(4-ethylphenyl)-1,3-thiazol-2-yl]-1-methylsulfonylpyrrolidine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H21N3O3S2
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