Using CCCc1cc([Sn](C)(C)C)nc(C#N)n1, Ic1cccc(C2CCCC2)c1 to produce CCCc1cc(-c2cccc(C3CCCC3)c2)nc(C#N)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.