You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 5-[5-(2-methyl-3H-benzimidazol-5-yl)-1,3,4-oxadiazol-2-yl]-2-(propan-2-ylamino)benzonitrile ?
user
C20H18N6O
assistant