| 2-(Tetrahydro-2,6-dioxopyran-3-yl)isoin-dole-1,3(2H)-dione |
| N-(Tetrahydro-2,6-dioxopyran-3-yl)phthalimide |
| 2-phthalimido-glutaric anhydrid |
| 2-(tetrahydro-2,6-dioxo-2h-pyran-3-yl)-1h-isoindole-3(2h)-dione |
| 2-phthalimidoglutaric acid anhydride |
| dihydro-2-phthalimido-2h-pyran-6(3h)-dione |
| 4-phthalimidoglutaric anhydride |
| alpha-phthalimidoglutaric anhydride |
| n-phthaloyl-dl-glutamic anhydride |