Tioxolone4991-65-533 % similar 2,7-Naphthalenediol582-17-232 % similar Hydroxyquinol533-73-331 % similar Serotonin hydrochloride153-98-031 % similar 2,6-Dihydroxyanthraquinone84-60-631 % similar 6-Methoxy-2(3H)-benzothiazolone40925-65-330 % similar Resorcinol108-46-330 % similar