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-[3-[(3S,3'aS,7'aS)-6-chloro-1'-(cyclopropylmethyl)-2,4'-dioxospiro[1H-indole-3,2'-3,3a,5,6,7,7a-hexahydropyrrolo[3,2-c]pyridine]-3'-yl]-5-chloro-4-fluorophenyl]benzaldehyde is given. What is its corresponding molecular formula?
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C31H26Cl2FN3O3
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