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 2-[(5,6-dimethyl-1H-benzimidazol-2-yl)sulfanyl]-N-(2-piperidin-1-ium-1-ylethyl)acetamide .
user
C18H27N4OS+
assistant