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 2,4-diethoxy-N-[2-[(4-methyl-6-pyrrolidin-1-ylpyrimidin-2-yl)amino]ethyl]benzenesulfonamide .
user
C21H31N5O4S
assistant