You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (3-methylsulfonylphenyl)-[4-[4-(trifluoromethoxy)phenyl]sulfonylpiperazin-1-yl]methanone is given. What is its corresponding molecular formula?
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C19H19F3N2O6S2
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