Using BrC[P+](c1ccccc1)(c1ccccc1)c1ccccc1, CC(C)(C)N1CCC(=O)CC1 to produce CC(C)(C)N1CCC(=CBr)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.