You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-(5a,9a-dihydrodibenzofuran-4-yl)-2-[2-(4,6-diphenyl-1,3,5-triazin-2-yl)-9,9'-spirobi[fluorene]-4'-yl]quinazoline .
user
C60H37N5O
assistant