Using O=C1CC2CCCc3sc(Br)cc3C2=NN1c1ccc(Cl)cc1 to produce O=c1cc2c(nn1-c1ccc(Cl)cc1)-c1cc(Br)sc1CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.