You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2,6-dibromo-4-[(3-chloro-2-methylphenyl)iminomethyl]phenyl] 4-chlorobenzenesulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H13Br2Cl2NO3S
assistant