19171-18-7 3-(1',3'-Dioxo-4'-nitroisoindolinyl-2')-2,6-dioxopiperidine 3-Nitrothalidomide 4-Nitrothalidomide N-(2,6-Dioxo-3-piperidyl)-3-nitrophthalimide Phthalimide, N-(2,6-dioxo-3-piperidyl)-3-nitro-