1,4-diamino-2-(2-butyltetrazol-5-yl)-3-cyanoanthraquinone

1,4-Diamino-2-(2-butyl-2H-tetrazol-5-yl)-3-cyano-9,10-anthraquinone

1,4-Diamino-3-(2-butyl-2H-tetrazol-5-yl)-9,10-dihydro-9,10-dioxo-2-anthracenecarbonitrile