1-Amino-4-hydroxy-2-[2-(ethoxycarbonyloxy)ethoxy]anthraquinone

1-Amino-2-(2-ethoxycarbonyloxyethoxy)-4-hydroxy-9,10-anthraquinone

2-[(1-amino-9,10-dihydro-4-hydroxy-9,10-dioxo-2-anthryl)oxy]ethyl ethyl carbonate

Carbonic acid, 2-(1-amino-9,10-dihydro-4-hydroxy-9,10-dioxo-2-anthracenyl)oxyethyl ethyl ester