You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl N-[4-amino-2-[1-[(2-fluorophenyl)methyl]pyrazolo[3,4-b]pyridin-3-yl]-6-(methylamino)pyrimidin-5-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19FN8O2
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