Using CC(C)(C)OC(=O)N1CCC(O)CC1, COC(=O)c1ccc(O)cc1O to produce COC(=O)c1ccc(OC2CCN(C(=O)OC(C)(C)C)CC2)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.