You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,6S)-7-[2-(2-bicyclo[2.2.1]heptanyl)ethyl]-3-cyclohexyl-6-[(4-methoxyphenyl)methyl]-2,3,5,6-tetrahydro-1H-imidazo[1,2-a]imidazol-4-ium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H42N3O+
assistant