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 3-[9,9-bis(3-bicyclo[4.2.0]octa-1(6),2,4-trienyl)-2,7-dimethylfluoren-3-yl]-9-phenylcarbazole .
user
C49H37N
assistant