1H-benz[6,7]indazole[2,3,4-fgh]naphth[2'',3'':6',7']indolo[3',2':5,6]anthra[2,1,9-mna]acridine-2,7,10,15-tetrone; Dycosthren Grey M; Grey M; Hibeithrene Grey M; Indanthren Grey M; Mikethrene Grey M; Nihonthrene Grey M; Novatic Grey M; Paradone Grey M; Vat Grey V; Caledon Grey M; Vat Grey S; Ostanthren Grey M; Benzadone Grey M; Vat Gray S