Using CCOC(=O)CCCCCC(=O)O, CC(C)(C)OC(=O)Nc1ccccc1N to produce CCOC(=O)CCCCCC(=O)Nc1ccccc1NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.