Using CCCC[Sn](CCCC)(CCCC)c1ccccn1, Cc1c(Cl)nc2ccccc2c1Cl to produce Cc1c(-c2ccccn2)nc2ccccc2c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.