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 1-N-(3-chlorophenyl)-3-N-(11,11-diphenylbenzo[b]fluoren-3-yl)-1-N,3-N-diphenylbenzene-1,3-diamine .
user
C53H37ClN2
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