You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-(4-chlorophenyl)sulfonyl-N-[5-chloro-2-(1,2,4-triazol-1-yl)phenyl]propanamide by IUPAC nomenclature, provide its molecular formula.
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C17H14Cl2N4O3S
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