1-Amino-2,4-dihydroxyanthraquinone 1-Amino-2,4-dioxyanthraquinone 1a-2,4doa 4-Amino-1,3-dihydroxyanthraquinone 4-Aminoxanthopurpurin 81-51-6 9,10-Anthracenedione, 1-amino-2,4-dihydroxy- Anthraquinone, 1-amino-2,4-dihydroxy- NSC81259 WLN: L C666 BV IVJ DZ EQ GQ Xanthopurpurin, 4-amino-