Using CC(C)(C)c1cc(C#N)c(N)o1, Clc1ncnc2[se]c3c(c12)CCCC3 to produce CC(C)(C)c1cc(C#N)c(Nc2ncnc3[se]c4c(c23)CCCC4)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.