You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[3-ethyl-4-[methyl-(1-methylimidazo[4,5-c]pyridin-6-yl)amino]phenyl]methyl]-3,3-difluoroazetidine-1-sulfonamide into its molecular formula.
user
C20H24F2N6O2S
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