Using COc1cc2c(c(Cl)c1Cl)C(=O)C(C1CCCC1)C2, COC1(Cl)CC2=C(C=C1Cl)C(=O)C(C)(C1CCCC1)C2 to produce COc1cc2c(c(Cl)c1Cl)C(=O)C(C)(C1CCCC1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.