You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-acetylphenyl)-2-[2-hydroxy-5-(2-methoxypyridin-3-yl)phenyl]-3H-benzimidazole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H22N4O4
assistant