You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[2-(1-methylbenzimidazol-2-yl)ethyl]phenyl]-2-(3-oxo-1,4-benzoxazin-4-yl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H24N4O3
assistant