Using COC(C)(C)OC, O=C(CO)Nc1nc(-c2ccc(Br)cc2)cs1 to produce CC1(C)OCC(=O)N1c1nc(-c2ccc(Br)cc2)cs1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.