You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-bis[4-(1,2-diphenylbenzimidazol-5-yl)phenyl]-6,8-bis(9,9'-spirobi[fluorene]-2-yl)quinazoline;2,4-bis[4-(2,6-diphenylpyrimidin-4-yl)phenyl]-6,8-bis(9,9'-spirobi[fluorene]-2-yl)quinazoline;6,8-bis(9,9'-spirobi[fluorene]-2-yl)-2,4-bis[4-(2,4,5-triphenylimidazol-1-yl)phenyl]quinazoline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C322H198N18
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