Using [NH4+], CCOC(=O)CCN1CCc2cc(OC)c(OC)cc2C1CC(=O)OCC to produce CCOC(=O)C1=C(N)CC2c3cc(OC)c(OC)cc3CCN2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.