You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[3-(1-benzyl-1,3-dimethylbenzo[e]indol-2-ylidene)prop-1-enyl]-3-[[2-[3-(1-benzyl-1,3-dimethylbenzo[e]indol-2-ylidene)prop-1-enyl]spiro[benzo[e]indol-3-ium-1,1'-cyclohexane]-3-yl]methyl]spiro[benzo[e]indol-3-ium-1,1'-cyclohexane] is given. What is its corresponding molecular formula?
user
C83H78N4+2
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