Using CCCC[Sn](CCCC)(CCCC)c1cccc(C)n1, Clc1cc(Cl)c2cccnc2n1 to produce Cc1cccc(-c2cc(Cl)c3cccnc3n2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.