You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-2-amino-N-[2-[4-(5-bromopyridin-2-yl)piperazin-1-yl]-2-oxoethyl]-3-methylbutanamide;dihydrochloride ?
user
C16H26BrCl2N5O2
assistant