You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-tert-butyl-3-[2-(1H-imidazo[4,5-b]pyridin-7-yl)-2-methylpropyl]pyrazolo[1,5-a]pyrimidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H24N6
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