You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 3-[5-[1-(4-amino-3-formylpyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-3-chloro-2-fluoro-6-methoxyphenyl]azetidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26ClFN6O4
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