You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[3-[1-(2-pyrrolidin-1-ylethyl)benzimidazol-5-yl]-1,2,4-oxadiazol-5-yl]benzonitrile .
user
C22H20N6O
assistant