You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-(2-methyl-1H-isoquinolin-3-yl)-2-naphthalen-1-yl-9-(4-phenylphenyl)-4-(4-pyridin-2-ylphenyl)-1,10-phenanthroline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C55H38N4
assistant