You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-cyanophenyl)-4-[1-[2-(dimethylamino)ethyl]imidazol-2-yl]piperidine-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H26N6O
assistant