You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-3-[(1R,2R)-2-(3-bromophenyl)cyclopropyl]-2-cyano-3-oxo-N-propan-2-ylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H17BrN2O2
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