You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[[1-[[(5-bromo-6-chloropyridin-3-yl)-methylamino]methyl]cyclopropyl]methyl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H23BrClN3O2
assistant