You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-(2,5-dimethylpyrazol-3-yl)-3-[2,2-dimethyl-1-[3-(trifluoromethyl)phenyl]propyl]urea by IUPAC nomenclature, provide its molecular formula.
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C18H23F3N4O
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