You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named methyl 2-[4-methyl-1-[2-[(3-phenyl-1H-pyrazole-5-carbonyl)amino]acetyl]piperazin-2-yl]acetate by IUPAC nomenclature, provide its molecular formula.
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C20H25N5O4
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