Using Nc1ccc(CC(CC(=O)N(Cc2ccccc2)OCc2ccccc2)C(=O)O)cn1 to produce Nc1ccc(CC(CC(=O)N(O)Cc2ccccc2)C(=O)O)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.