You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 3-[2-[(4-chloro-2-ethoxyphenyl)methyl]-5-propan-2-yloxypyrazol-3-yl]propanoate by IUPAC nomenclature, provide its molecular formula.
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C20H27ClN2O4
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