Using CC(C)(C)OC(=O)N1CCCC(C(=O)O)C1, Nc1ccccc1 to produce CC(C)(C)OC(=O)N1CCCC(C(=O)Nc2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.