Using CCCC[Sn](CCCC)(CCCC)c1cccn1C, CCNC(=O)Nc1nc2cc(-c3cccnc3)cc(I)c2s1 to produce CCNC(=O)Nc1nc2cc(-c3cccnc3)cc(-c3cccn3C)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.