You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(7-cyanobenzimidazol-1-yl)-N,N'-dinaphthalen-2-yl-3-(7-nitrobenzimidazol-1-yl)butanediamide into its molecular formula.
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C39H26N8O4
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