Synonyms: Benzamide,N-[16,17,22,23-tetrahydro-17,22-dioxo-5,10,15,24-tetrakis(sulfooxy)naphth[2',3':6,7]indolo[2,3-c]dinaphtho[2,3-a:2',3'-i]carbazol-18-yl]-,tetrapotassium salt (9CI);Naphth[2',3':6,7]indolo[2,3-c]dinaphtho[2,3-a:2',3'-i]carbazole, benzamidederiv.