You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[3-(2-amino-3-bromophenyl)-4-oxobutyl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H29BrN2O5
assistant