Using CCO, CC(C)(C)OC(=O)CN[C@H](Cc1ccccc1)C(=O)O to produce CCOC(=O)[C@@H](Cc1ccccc1)NCC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.