You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[[1-(2,6-difluorophenyl)pyrazol-3-yl]methylamino]-N-(oxolan-3-ylmethyl)pyridine-3-sulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C20H21F2N5O3S
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