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 2-(4-tert-butylphenyl)-5-[2-[2-(4-tert-butylphenyl)-2-methyl-3H-1,3,4-oxadiazol-5-yl]-9,9'-spirobi[fluorene]-2'-yl]-1,3,4-oxadiazole is given. What is its corresponding molecular formula?
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C50H44N4O2
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