You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-[4-[4-(2-ethylbenzimidazol-1-yl)phenyl]phenyl]-2,5-diphenylpyrazolo[5,1-a]isoquinoline is given. What is its corresponding molecular formula?
user
C44H32N4
assistant