Using CCCC(CC(=O)OCC)n1c(=O)[nH]c2ccccc21, COc1ccc(Br)cc1CO to produce CCCC(CC(=O)O)n1c(=O)n(Cc2cc(Br)ccc2OC)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.