You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[[4-(5-bromopyridin-2-yl)piperazin-1-yl]methyl]-3-tert-butyl-1,2,4-oxadiazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H22BrN5O
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