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system
Name the molecular formula for the molecule established as 2-(4-methyl-3-nitrophenyl)-5-[4-[4-[5-(4-methyl-3-nitrophenyl)-1,3,4-oxadiazol-2-yl]phenoxy]phenyl]-1,3,4-oxadiazole using the IUPAC nomenclature.
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C30H20N6O7
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