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 2-N-[[4-(1-ethenyl-2,9,9-trimethylindeno[2,1-f]indol-3-yl)phenyl]methyl]-2-N-phenylbenzene-1,2-diamine .
user
C39H35N3
assistant