Using CC(C)CC(CNCC(=O)OC(C)(C)C)NC(=O)C1CCCN1C(=O)OCc1ccccc1 to produce COC(=O)CNCC(CC(C)C)NC(=O)C1CCCN1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.