Using CC1=Cc2ccccc2C1[Zr](C)(C)(=[SiH2])C1C(C)=Cc2ccccc21 to produce CC1=CC2=C(CCCC2)C1[Zr](C)(C)(=[SiH2])C1C(C)=CC2=C1CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.