You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[N-methyl-3-(trifluoromethyl)anilino]sulfanyl-5-(1-piperidin-4-ylpyrazol-4-yl)pyridin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H23F3N6S
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