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 diethyl (3aR,8aR,8bS)-8b-chloro-1,3-dioxo-2-phenylspiro[3a,6,8,8a-tetrahydrocyclopenta[e]isoindole-4,1'-cyclopropane]-7,7-dicarboxylate is given. What is its corresponding molecular formula?
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C25H26ClNO6
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