You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[2-(6,7-dimethoxy-1-phenyl-3,4-dihydro-1H-isoquinolin-2-yl)-2-oxoethyl]piperidin-2-one into molecular formula.
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C24H28N2O4
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