You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,5S)-1,3-bis(2-cyclohexylphenyl)-4,5-diphenyl-4,5-dihydroimidazol-1-ium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C39H43N2+
assistant