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 4-N-(3-ethylsulfonylphenyl)-6-N-[3-[3-(methylsulfonylmethyl)phenyl]phenyl]pyrimidine-4,6-diamine using the IUPAC nomenclature.
user
C26H26N4O4S2
assistant