You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[6-(5-bromopyridin-2-yl)oxy-2-azabicyclo[2.2.1]heptan-2-yl]-(4-methyl-2-pyrimidin-2-ylphenyl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H21BrN4O2
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