You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(3S)-3-(4-methyl-1H-benzimidazol-2-yl)piperidine-1-carbonyl]anilino]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H24N4O3
assistant