Using NC(=O)c1ccc(OCCNCC(O)c2ccc(OCc3ccccc3)cc2)cc1O to produce NC(=O)c1ccc(OCCNCC(O)c2ccc(O)cc2)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.