You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-bromospiro[fluorene-9,10'-indeno[1,2-b][1]benzofuran];carbanide;N-[4-(9,9-dimethylfluoren-2-yl)phenyl]-N-phenylspiro[fluorene-9,10'-indeno[1,2-b][1]benzofuran]-2-amine;methane ?
user
C83H59BrNO2-
assistant