You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-(9,9-dimethylfluoren-2-yl)-N-[4-[(Z)-3-(3-ethyl-1-phenylindol-2-yl)prop-2-enyl]phenyl]-9,9-dimethylfluoren-2-amine ?
user
C55H48N2
assistant