Using Nc1sc2c(c1C(=O)c1ccc(Cl)c(Cl)c1)CCC2, CC(=O)CC(=O)C1CC1 to produce Cc1nc2sc3c(c2c(-c2ccc(Cl)c(Cl)c2)c1C=O)CCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.