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 2-(benzimidazol-1-yl)-N-[2-[[6-(4,5-dimethylimidazol-1-yl)pyrimidin-4-yl]amino]ethyl]acetamide .
user
C20H22N8O
assistant