You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,5-difluorophenyl)-3-(1-propyl-5-pyrrolidin-1-ylsulfonylbenzimidazol-2-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26F2N4O3S
assistant