You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-4-[2-[4-[2-(4-methyl-1-oxo-3H-2-benzofuran-5-yl)propyl]piperazin-1-yl]ethyl]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31N3O3
assistant