You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(3,5-dimethylpyrazol-1-yl)-2-methylpropyl]-3-pyrrolidin-1-ylsulfonylthiophene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H26N4O3S2
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