You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-ethyl-4-[1-[4-[4-(1-ethylpyridin-1-ium-4-yl)pyridin-1-ium-1-yl]butyl]pyridin-1-ium-4-yl]pyridin-1-ium into molecular formula.
user
C28H34N4+4
assistant