You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-[2-(1-benzyl-2,5-dimethylpyrrol-3-yl)-2-oxoethyl]-5-ethenylpyridin-2-one is given. What is its corresponding molecular formula?
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C22H22N2O2
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