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 3-(6-bromo-1H-indol-3-yl)-4-(1-ethylpyrazolo[3,4-c]pyridazin-3-yl)-1-phenylpyrrole-2,5-dione is given. What is its corresponding molecular formula?
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C25H17BrN6O2
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