You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[2-[3-(7,7-dimethylindeno[2,1-b]carbazol-5-yl)phenyl]-6-phenylpyrimidin-4-yl]phenyl]benzonitrile;3-[4-phenyl-6-(18-phenyl-10,20-dioxapentacyclo[11.7.0.03,11.04,9.014,19]icosa-1,3(11),4(9),5,7,12,14(19),15,17-nonaen-8-yl)-1,3,5-triazin-2-yl]benzonitrile;4-[6-phenyl-2-(11-phenylindolo[2,3-a]carbazol-12-yl)pyrimidin-4-yl]benzonitrile;3-[4-phenyl-6-(5-phenylindolo[3,2-c]carbazol-12-yl)-1,3,5-triazin-2-yl]benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C171H105N19O2
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