You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 5-(9,9-dimethylfluoren-3-yl)-12-(4-naphthalen-2-ylquinazolin-2-yl)-[1]benzofuro[2,3-a]carbazole .
user
C51H33N3O
assistant