You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (2S,4S)-4-[3-bromo-4-cyano-5-(methylamino)pyrazol-1-yl]-2-methylpyrrolidine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H22BrN5O2
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