You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-benzyl-2-[(5-tert-butyl-1H-1,2,4-triazol-3-yl)sulfanylmethyl]-5-chlorobenzimidazole ?
user
C21H22ClN5S
assistant