Using CCCCBr, O=c1oc2ccc(Br)cc2c(O)c1-c1ccccc1 to produce CCCCOc1c(-c2ccccc2)c(=O)oc2ccc(Br)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.