4,4'isopropylidenediphenol "bisphenol a, diphenylolpropane" and its salts
Hydroquinone "quinol" and its salts
Polyphenols and phenolalcohols (excl. resorcinol and hydroquinone "quinol" and their salts, and 4,4'isopropylidenediphenol "bisphenol a, diphenylolpropane" and its salts)