Using O=C1C(Cl)=C(Cl)C(=O)C(Cl)=C1Cl, C1=C2CCCCC2Cc2cc3cc4ccccc4cc3cc21 to produce C1=CC2c3cc4ccccc4cc3C1c1cc3ccccc3cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.