You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R)-N-[(4-chlorophenyl)methyl]-1-(2,4-dimethylphenyl)-2-methyl-4-methylsulfonyl-6-oxopiperazine-2-carboxamide .
user
C22H26ClN3O4S
assistant