You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[5-(4-chloro-3-methylphenoxy)pyridin-2-yl]ethoxy]-1-[(1-methylpyrazol-4-yl)methyl]pyrimidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H22ClN5O3
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