You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(pyridin-3-ylmethyl)-N-[[3-(trifluoromethoxy)phenyl]methyl]piperidine-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C20H22F3N3O2
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