You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (3E)-3-(3H-benzo[e]benzimidazol-1-ium-2-ylmethylidene)-5-[(Z)-1,3-dihydrobenzo[e]benzimidazol-2-ylidenemethyl]cyclopentane-1,2,4-trione is given. What is its corresponding molecular formula?
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C29H19N4O3+
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