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Name the molecular formula for the molecule established as [(5R)-3',3'-bis(4-chlorophenyl)-4-(4-nitrophenyl)spiro[1,3,4-thiadiazole-5,1'-2-benzothiophene]-2-yl]-phenylmethanone using the IUPAC nomenclature.
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C34H21Cl2N3O3S2
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