Using COC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1O, NCCC(=O)O to produce O=C(O)CCNC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.