Using COC(=O)c1c(NC(=O)C(C)(C)C)ccc2c1OCC1C2C1(Br)Br to produce COC(=O)c1c(NC(=O)C(C)(C)C)ccc2c1OCC1CC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.