You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[[4-hydroxy-1-(3-phenylbutanoyl)piperidin-4-yl]methyl]-6-(oxan-4-ylmethylamino)pyrimidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H36N4O4
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