You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[2-(dimethylamino)-2-(furan-2-yl)ethyl]-1-thiophen-2-ylsulfonylpiperidine-4-carboxamide into molecular formula.
user
C18H25N3O4S2
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