You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-butyl-5-(dimethylsulfamoyl)benzimidazol-2-yl]-N-[(4-fluoro-3-methylphenyl)methyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H31FN4O3S
assistant