You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-[(4-methylphenyl)methyl]-2-[3-(4-methylphenyl)sulfonyl-2-oxoimidazol-1-yl]acetamide using the IUPAC nomenclature.
user
C20H21N3O4S
assistant