2,5-Cyclohexadien-1-one, 4-((4-hydroxyphenyl)imino)- 4-((4-Hydroxyphenyl)imino)-2,5-cyclohexadien-1-one 500-85-6 Benzenoneindophenol EINECS 207-913-5 INDOPHENOL Indophenol (8CI) N-(4-Hydroxyphenyl)-p-benzoquinone monoimine Phenolindophenol