Using CCOC(=O)C1CCN(Cc2cccc(NC(=O)OC(C)(C)C)c2)CC1 to produce CC(C)(C)OC(=O)Nc1cccc(CN2CCC(C(=O)O)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.