You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3S)-3-(2-chlorophenyl)-3-hydroxy-N-[6-isocyano-1-(1-methylcyclobutyl)benzimidazol-2-yl]butanamide into molecular formula.
user
C23H23ClN4O2
assistant