You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-N-[3-methyl-6-(4-phenylazepane-1-carbonyl)-2-pyridin-3-ylbenzimidazol-4-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H31N5O3
assistant