You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-(4,6-diphenylpyrimidin-2-yl)phenyl]-4-(3-phenylphenyl)-[1]benzothiolo[3,2-d]pyrimidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H28N4S
assistant