Using COc1cc(C=Cc2cc(OC)c(OC)c(OC)c2)cc(Br)c1OC to produce Oc1cc(/C=C/c2cc(O)c(O)c(Br)c2)cc(O)c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.