You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(2,5-dichloro-N-(4-methylphenyl)sulfonylanilino)-N-[4-[(3-methylphenyl)sulfamoyl]phenyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C28H25Cl2N3O5S2
assistant