You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 5-chloro-2-[6-[5-(2-hydroxypropan-2-yl)benzimidazol-1-yl]pyridin-2-yl]benzonitrile into its molecular formula.
user
C22H17ClN4O
assistant