You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S)-1-(3-bromophenyl)ethyl]-2-[4-[(4-bromophenyl)sulfamoyl]phenoxy]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H20Br2N2O4S
assistant