You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-amino-N-[4-[(2R,4R,5S,6S)-6-(chloromethyl)-4,5-dihydroxyoxan-2-yl]pyridin-3-yl]-2-(2,6-difluorophenyl)pyrimidine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H20ClF2N5O4
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