You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[[[2-(5,6-difluorobenzimidazol-1-yl)-3-methylbutanoyl]amino]methyl]phenyl]-3-fluorobenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23F3N4O2
assistant