3H-Anthra[1,2-c]pyrazole-6,11-dione, 2-[1-(acetylamino)-2- (4-nitrophenyl)ethenyl)- Acetamide, N-[2-(4-nitrophenyl)-1-(6,11-dihydro-6,11-dioxo3H-anthra[1,2-c]pyrazol-2-yl)ethenyl]- NSC624439