You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S,4R)-2-(cyclohexylidenemethyl)-4-phenylpiperidin-1-yl]-[(3'S,8S)-2-methylspiro[1,5,6,7-tetrahydroimidazo[1,2-a]pyridin-4-ium-8,4'-pyrrolidine]-3'-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H41N4O+
assistant