Using CCOC(=O)C[C@@]12CC[C@@H]1CCC(Br)(Br)C2=O to produce CCOC(=O)C[C@@]12CC[C@@H]1CC=C(Br)C2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.