Using NCC(=O)O, COC(=O)c1nc(C)c2ccc(Oc3ccc(OC)cc3)cc2c1O to produce COc1ccc(Oc2ccc3c(C)nc(C(=O)NCC(=O)O)c(O)c3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.