Using CCCC[Sn](CCCC)(CCCC)c1ccnnc1, COC(=O)c1cc(Br)cc2c1c(C)cn2C(C)C to produce COC(=O)c1cc(-c2ccnnc2)cc2c1c(C)cn2C(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.