Using COCC(C)Nc1cc([Sn](C)(C)C)ncn1, Clc1ccnc(Cl)n1 to produce COCC(C)Nc1cc(-c2ccnc(Cl)n2)ncn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.