You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1,3-dimethyl-2-oxobenzimidazol-5-yl)-3-[5-(dimethylsulfamoyl)-1-methylbenzimidazol-2-yl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H26N6O4S
assistant