You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
phenyl-[4-[[1,4,4-tris[(4-benzoylphenyl)methyl]piperazine-1,4-diium-1-yl]methyl]phenyl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C60H52N2O4+2
assistant