Using COC(=O)c1ccc(NC(C)=O)c(N)c1, CC(=O)OCC(OC(C)=O)C(=O)O to produce COC(=O)c1ccc(NC(C)=O)c(NC(=O)C(COC(C)=O)OC(C)=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.