Using O=C1NC(=O)C(c2ccc(N=Cc3ccc(Cl)c(Cl)c3)cc2)S1 to produce O=C1NC(=O)C(c2ccc(NCc3ccc(Cl)c(Cl)c3)cc2)S1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.