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 (2R,3R)-2-(4-bromophenyl)-3-(4-chlorobenzoyl)spiro[3,10b-dihydro-2H-pyrrolo[2,1-a]phthalazine-1,2'-indene]-1',3'-dione is given. What is its corresponding molecular formula?
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C32H20BrClN2O3
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