Using CCOC(=O)CC(C)(C)C(=O)c1ccc(O)cc1, ClCCCBr to produce CCOC(=O)CC(C)(C)C(=O)c1ccc(OCCCCl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.