You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-ethyl-N-[1-[3-[3-[N-methyl-C-[(Z)-3-oxobut-1-enyl]carbonimidoyl]phenyl]propyl]benzimidazol-2-yl]benzamide by IUPAC nomenclature, provide its molecular formula.
user
C31H32N4O2
assistant