Using CCCC[Sn](CCCC)(CCCC)c1ccnn1C, CC1CN(C(=O)C(F)(F)F)CCc2cc(O)ccc21 to produce CC1CN(C(=O)C(F)(F)F)CCc2cc(-c3ccnn3C)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.