Using CCOC(=O)c1nc(Cl)c2cc(Cl)ccc2n1, NCc1ccc2c(c1)OCO2 to produce CCOC(=O)c1nc(NCc2ccc3c(c2)OCO3)c2cc(Cl)ccc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.