Using BrCCCCBr, CC(C)(C)OC(=O)N1CCCC(CNc2cc(Nc3cnc(C#N)cn3)ncc2N)C1 to produce N#Cc1cnc(Nc2cc(NCC3CCCNC3)c(N3CCCC3)cn2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.