You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[4-bromo-1-[(2,4-dichlorophenyl)methyl]pyrazol-3-yl]-3-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
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C18H14BrCl3F3N5O
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