Using Nc1ccc(O)cc1, CC(=O)OCC(C)(C)C(OC(C)=O)C(=O)NCCC(=O)O to produce CC(=O)OCC(C)(C)C(OC(C)=O)C(=O)NCCC(=O)Nc1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.