You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[2-[[2-[[6-(diaminomethylideneamino)-1H-benzimidazol-2-yl]methyl]-3-methylbenzimidazole-5-carbonyl]amino]ethoxy]benzoic acid into molecular formula.
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C27H26N8O4
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