2-(2,6-dioxopiperidin-3-yl)-4-nitroisoindoline-1,3-dione; 2-(2,6-Dioxo-3-piperidinyl)-4-nitro-1H-isoindole-1,3(2H)-dione; 2-(2,6-Dioxopiperidin-3-yl)-4-nitro-isoindole-1,3-dione; 4-Nitro-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione;
2-(2,6-dioxopiperidin-3-yl)-4-nitroisoindoline-1,3-dione; 2-(2,6-Dioxo-3-piperidinyl)-4-nitro-1H-isoindole-1,3(2H)-dione; 2-(2,6-Dioxopiperidin-3-yl)-4-nitro-isoindole-1,3-dione; 4-Nitro-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione;