2,3,5,6-Tetrabromo-1,4-benzenediol2641-89-642 % similar Squaric acid2892-51-542 % similar Tetrachloro-P-hydroquinone87-87-642 % similar Tetrachlorocatechol1198-55-638 % similar Croconic acid488-86-838 % similar Pentabromophenol608-71-938 % similar Pentachlorophenol87-86-538 % similar Pyrogallol87-66-133 % similar 2,6-Dibromophenol608-33-331 % similar