Using COc1ccc(-[s+]2c3ccccc3c3ccccc32)cc1CC(=O)O, O=C1OCCC1Br to produce COc1ccc(-[s+]2c3ccccc3c3ccccc32)cc1CC(=O)OC1CCOC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.