You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-methyl-2-[1-(3-oxo-1,4-dihydroisochromen-7-yl)piperidin-4-yl]oxy-6-pyrimidin-4-ylpyrimidin-4-one into its molecular formula.
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C23H23N5O4
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