Acetamide,2-cyano-2-[2,3-dihydro-3-(1,4-dihydro-2,4-dioxo-3(2H)-quinolinylidene)-1H-isoindol-1-ylidene]-N-(2,3-dihydro-2-methyl-1,3-dioxo-1H-isoindol-5-yl)-