You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[3,4,5-tris(3-cyanocarbazol-9-yl)-2-(2,6-diphenylpyrimidin-4-yl)-6-(4,6-diphenylpyrimidin-2-yl)phenyl]carbazole-3-carbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C90H50N12
assistant