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 4-[[4-hydroxy-3-[(4-sulfophenyl)diazenyl]naphthalen-1-yl]diazenyl]benzenesulfonic acid is given. What is its corresponding molecular formula?
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C22H16N4O7S2
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