You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[3-chloro-4-[(4-chlorophenyl)sulfamoyl]phenyl]-3-[(2R,6S)-2,6-dimethylmorpholin-4-yl]propanamide .
user
C21H25Cl2N3O4S
assistant