2-Isoindolinebutyric acid, 1,3-dioxo- 2H-Isoindole-2-butanoic acid, 1,3-dihydro-1,3-dioxo- 3130-75-4 4-Phthalimidobutyric acid Butyric acid, 4-phthalimido- N-Phthalyl-.gamma.-aminobutyric acid NSC119133