You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[1-[3-(4-chloro-3,5-dimethylphenoxy)propyl]benzimidazol-2-yl]-1-phenylpyrrolidin-2-one by IUPAC nomenclature, provide its molecular formula.
user
C28H28ClN3O2
assistant