You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-tert-butylphenyl)-4-[4-(1H-pyrrol-3-ylmethyl)piperazin-1-yl]-1H-benzimidazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31N5
assistant