You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[5-[1-[4-(4-chloro-3-methylphenoxy)butyl]benzimidazol-2-yl]pentyl]-2-ethylbutanamide is given. What is its corresponding molecular formula?
user
C29H40ClN3O2
assistant