You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (E)-3-(2,3-dichlorophenyl)-N-[1-[[5-(1,1-difluoroethyl)furan-2-yl]methyl]pyrazol-3-yl]prop-2-enamide by IUPAC nomenclature, provide its molecular formula.
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C19H15Cl2F2N3O2
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