You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[5-[1-[2-(4-chlorophenoxy)ethyl]benzimidazol-2-yl]pentyl]but-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H28ClN3O2
assistant