Using CCOC(=O)CC[C@H](N)C(=O)OCC, CC(C)(C)OC(=O)NCc1ccc(C(=O)O)cc1 to produce CCOC(=O)CC[C@H](NC(=O)c1ccc(CNC(=O)OC(C)(C)C)cc1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.