You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-4-(6-bromopyridin-2-yl)-2-propan-2-yl-3-(2H-tetrazol-5-yl)butanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H16BrN5O2
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