You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-tert-butyl-1-methyl-1-[2-[3-(4-methylphenyl)-5-(1-methylpyrrol-2-yl)-3,4-dihydropyrazol-2-yl]-2-oxoethyl]urea by IUPAC nomenclature, provide its molecular formula.
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C23H31N5O2
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