Using CC(C)(C)OC(=O)N1CCC(c2nc(Br)cn2CCN2CCCC2)CC1, ClCCl to produce Brc1cn(CCN2CCCC2)c(C2CCNCC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.