Using Cc1nc(S)sc1CC(=O)O, CC(C)(C)OC(=O)C(C)(C)Br to produce Cc1nc(SC(C)(C)C(=O)OC(C)(C)C)sc1CC(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.