Using Cc1cccc(C(Cc2ccnc3ccc(Br)cc23)=NN2CCCC2=O)n1 to produce Cc1cccc(-c2nn3c(c2-c2ccnc4ccc(Br)cc24)CCC3)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.