Using CCOC(=O)c1ccc(N)cc1, CC(C)(C)OC(=O)N1CCCc2ccc(C(=O)O)cc21 to produce CCOC(=O)c1ccc(NC(=O)c2ccc3c(c2)N(C(=O)OC(C)(C)C)CCC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.