Using COc1cc(O)cc(Br)c1, CC(C)(C)OC(=O)N1CCC(O)CC1 to produce COc1cc(Br)cc(OC2CCN(C(=O)OC(C)(C)C)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.