Using COC(=O)Cc1ccccc1C(F)(F)F, CC(C)(C)OC(=O)CCBr to produce COC(=O)C(CCC(=O)OC(C)(C)C)c1ccccc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.