You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]-N-(pyridin-3-ylmethyl)piperidine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C20H23N7O
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