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 ethyl 1-[2-[methyl-[2-(2-methyl-N-methylsulfonylanilino)acetyl]amino]acetyl]piperidine-3-carboxylate .
user
C21H31N3O6S
assistant