Using NCCc1ccc2c(c1)OCO2, CCOC(=O)C(CC(=O)O)c1nc(-n2ccnc2)ns1 to produce CCOC(=O)C(CC(=O)NCCc1ccc2c(c1)OCO2)c1nc(-n2ccnc2)ns1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.