You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-carbazol-9-yl-9-phenyl-1-[1-[4-phenyl-2,6-di(propan-2-yl)phenyl]benzimidazol-2-yl]-2H-carbazol-2-ide;iridium;2-phenylpyridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C66H51IrN5-2
assistant