You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[2-(3-chloroanilino)-2-oxoethyl]-3-[3,5-dimethyl-1-[(4-methylphenyl)methyl]pyrazol-4-yl]-N-methylprop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
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C25H27ClN4O2
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