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Under IUPAC nomenclature, a molecule named 2-[3-methyl-5-(trifluoromethyl)pyrazol-1-yl]-1-[4-[[3-(trifluoromethyl)phenyl]methyl]piperazin-1-yl]ethanone is given. What is its corresponding molecular formula?
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C19H20F6N4O
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