Using CCCCOC(=O)c1ncc2ccc(Oc3ccccc3)cc2c1O, NCCCC(=O)O to produce O=C(O)CCCNC(=O)c1ncc2ccc(Oc3ccccc3)cc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.