Synonyms: 5,10-dihydro-5,10-dioxonaphtho(2,3-b)(1,4)dithiazine-2,3-dicarbonitrile; 1,4-dithiaanthraquinone-2,3-dicarbonitrile; 1,4-dithiaanthraquinone-2,3-dinitrile; 2,3-dicarbonitrilo-1,4-diathiaanthrachinon; 2,3-dinitrilo-1,4-dithia-9,10-anthraquinone; 2,3-dinitrilo-1,4-dithiaanthraquinone; 2,3-dinitrilo-1,4-dithia-anthraquinone; 2,3-dinitrilo-1,4-dithioanthrachinon; 3-b)-1,4-dithiin-2,3-dicarbonitrile,5,10-dihydro-5,10-dioxo-naphtho(