You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(4-ethylphenyl)methyl]-1-[1-[(3-fluorophenyl)methyl]benzimidazol-2-yl]piperidine-4-carboxamide into its molecular formula.
user
C29H31FN4O
assistant