2,5-Cyclohexadiene-1,4-dione, 2,5-dihydroxy-3,6-bis(4-hydroxyphenyl)- (9CI) 519-67-5 Atromentin NSC 187730 p-Benzoquinone, 2,5-dihydroxy-3,6-bis(p-hydroxyphenyl)- (8CI)