You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-chloro-3-piperidin-1-ylsulfonylphenyl)-3-(3-methyl-2-oxobenzimidazol-1-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25ClN4O4S
assistant