Using CCOC(=O)CCCCCC(c1ccccc1)c1cc(Cl)c2ccccc2c1O to produce CCOC(=O)CCCCCC(c1ccccc1)c1ccc2ccccc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.