Using O=C(CCC(=O)N1CCC[C@H]1C(=O)O)c1ccc(Br)cc1, BrBr to produce O=C(c1ccc(Br)cc1)C(Br)CC(=O)N1CCC[C@H]1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.