You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-chloro-N-[(2,4-dichlorophenyl)methyl]-3-[(3,5-dimethylphenyl)sulfamoyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19Cl3N2O3S
assistant