You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[(7Z)-7-(chloromethylidene)-9-(1,1,3-trimethylbenzo[e]indol-3-ium-2-yl)nona-2,8-dienylidene]-1,1,3-trimethylbenzo[e]indole is given. What is its corresponding molecular formula?
user
C40H42ClN2+
assistant