You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[(4Z)-4-[(3-ethoxy-4-hydroxy-5-iodophenyl)methylidene]-3-methyl-5-oxopyrazol-1-yl]benzoic acid into molecular formula.
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C20H17IN2O5
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