Using O=C(CCc1ccccc1O)NCCOc1ccc(Cl)cc1, CC(C)(C)OC(=O)C(C)(C)Br to produce CC(C)(C)OC(=O)C(C)(C)Oc1ccccc1CCC(=O)NCCOc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.