Using CCOC(=O)C1NC(C(=O)O)c2[nH]c3cccc(COC(C)=O)c3c2C1COC to produce CCOC(=O)c1ncc2[nH]c3cccc(COC(C)=O)c3c2c1COC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.