Using CCOC(=O)C(CCc1ccccc1)(CC(=O)c1ccc(Br)cc1)C(=O)OCC to produce CCOC(=O)C(CCc1ccccc1)CC(=O)c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.