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 1-(4-benzyl-2-methylimidazo[1,2-a]benzimidazol-1-yl)-3-[4-(dimethylamino)phenyl]prop-2-en-1-one .
user
C28H26N4O
assistant