You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[[2-methyl-6-(pyridin-2-ylamino)pyrimidin-4-yl]amino]phenyl]pyridine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19N7O
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