You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(6-imidazol-1-ylpyrimidin-4-yl)-N-[2-methoxy-5-(trifluoromethyl)phenyl]piperidine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H21F3N6O2
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