You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-tert-butyl-7-(2-methyl-2-pyrazolo[1,5-a]pyridin-5-ylpropyl)pyrazolo[1,5-a]pyridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H26N4
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