You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[(2-chlorophenyl)methoxy]-N-[1-(3-ethoxypropyl)benzimidazol-2-yl]acetamide is given. What is its corresponding molecular formula?
user
C21H24ClN3O3
assistant