Using CCOC(=O)c1cc(=O)c2c(OCC(O)COc3ccc(Br)cc3)cccc2o1 to produce O=C(O)c1cc(=O)c2c(OCC(O)COc3ccc(Br)cc3)cccc2o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.