Using O=C(O)C(=O)Cc1ccc(O)cc1, N[C@@H](Cc1ccc(O)cc1)C(=O)O to produce CC(C)OC(=O)C(Cc1ccc(O)cc1)NC(Cc1ccc(O)cc1)C(=O)OC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.