Using CCOC(=O)Cl, CCOC(=O)c1c(N)sc2c1CCN(C(C)=O)C2 to produce CCOC(=O)Nc1sc2c(c1C(=O)OCC)CCN(C(C)=O)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.