You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methane;8-[4-[4-[6-[4-[1-(8-phosphonooctyl)pyridin-1-ium-4-yl]phenyl]-2-[4-(trifluoromethyl)phenyl]pyrimidin-4-yl]phenyl]pyridin-1-ium-1-yl]octylphosphonic acid .
user
C50H61F3N4O6P2+2
assistant