You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named bis(4-tert-butylphenyl)methylidenezirconium(2+);2-tert-butyl-3-ethyl-5-methylcyclopenta-1,3-diene;3,6-ditert-butyl-1,9-dihydrofluoren-1-ide;dichloride by IUPAC nomenclature, provide its molecular formula.
user
C54H70Cl2Zr-2
assistant