You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-(1-methylbenzimidazol-2-yl)-8H-pyrido[2,3-b]indol-8-ide;methyl(diphenyl)phosphanium;osmium(2+) is the IUPAC name of a molecule. Please give its molecular formula.
user
C64H54N8OsP2+2
assistant