Using C=CCC[Zr](C)(=[SiH2])(C1C(C)=Cc2ccccc21)C1C(C)=Cc2ccccc21, Cl[SiH](Cl)Cl to produce CC1=Cc2ccccc2C1[Zr](C)(=[SiH2])(CCCC[Si](Cl)(Cl)Cl)C1C(C)=Cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.