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-[2-(dicyanomethylidene)-4-hydroxy-8-methoxy-[1,3]dithiolo[4,5-f][1,3]benzodithiol-6-ylidene]propanedinitrile is given. What is its corresponding molecular formula?
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C15H4N4O2S4
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