You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2E)-2-[(E)-3-(1-benzyl-3,3-dimethylindol-1-ium-2-yl)prop-2-enylidene]-1-butylbenzo[cd]indole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C35H35N2+
assistant