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 3-(3-chloro-4,5-dimethoxyphenyl)-N-ethyl-N-[(4-oxo-3H-quinazolin-2-yl)methyl]prop-2-enamide into molecular formula.
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C22H22ClN3O4
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