Using COC(=O)C=C(C(=O)OC)N1CC1c1ccc2c(c1)OCO2 to produce COC(=O)c1[nH]cc(-c2ccc3c(c2)OCO3)c1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.