You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,2,3,4,5-pentakis-phenyl-6-(6-phenylbenzimidazolo[1,2-a]benzimidazol-2-yl)-1,3,5,2,4,6-triazatriborinane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C49H37B3N6
assistant