You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(4-tert-butylphenyl)-5-[4-[3-(9-phenylcarbazol-3-yl)carbazol-9-yl]phenyl]-1,3,4-oxadiazole;2-[4-[3-(9-phenylcarbazol-3-yl)carbazol-9-yl]phenyl]-5-(2-phenylphenyl)-1,3,4-oxadiazole;2-[4-[3-(9-phenylcarbazol-3-yl)carbazol-9-yl]phenyl]-5-(3-phenylphenyl)-1,3,4-oxadiazole;2-[4-[3-(9-phenylcarbazol-3-yl)carbazol-9-yl]phenyl]-5-(4-phenylphenyl)-1,3,4-oxadiazole by IUPAC nomenclature, provide its molecular formula.
user
C198H132N16O4
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