You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[5-(9,9-dimethylindeno[2,1-b]pyridin-8-yl)benzimidazolo[1,2-a]benzimidazol-2-yl]-5-(4-phenylphenyl)benzimidazolo[1,2-a]benzimidazole into molecular formula.
user
C52H35N7
assistant