Using C=CCc1c(O)c(Br)cc2c(=O)c3ccccc3oc12, O=C([O-])[O-] to produce O=C(O)C1Cc2c(c(Br)cc3c(=O)c4ccccc4oc23)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.