You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule N-(2-cyanoethyl)-1-cyclopropyl-N-(4-ethoxyphenyl)-2,4-dioxopyrido[2,3-d]pyrimidine-6-carboxamide into molecular formula.
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C22H21N5O4
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