You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(2S)-2-[4-(dimethylamino)phenyl]-2-(4-phenylpiperazin-1-yl)ethyl]-5-methylthiophene-2-sulfonamide by IUPAC nomenclature, provide its molecular formula.
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C25H32N4O2S2
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