Using [NH4+], COC(=O)CCC(C(=O)OC)c1cc(OC)c(OC)cc1C=O to produce COC(=O)CCc1c(O)ncc2cc(OC)c(OC)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.