You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[4-[4-[carbamoyl-(4-methylphenyl)sulfonylamino]phenoxy]phenyl]-1-(4-methylphenyl)sulfonylurea by IUPAC nomenclature, provide its molecular formula.
user
C28H26N4O7S2
assistant