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+);3-tert-butyl-1-ethylcyclopenta-1,3-diene;1,9-dihydrofluoren-1-ide;dichloride by IUPAC nomenclature, provide its molecular formula.
user
C45H52Cl2Zr-2
assistant