131-68-0 5-22-13-00224 (Beilstein Handbook Reference) BRN 0492204 N-(2,6-Dioxo-3-piperidyl)phthalamic acid N-(o-Carboxybenzoyl)-D,L-glutamic acid imide N-(o-Carboxybenzoyl)-DL-glutaminsaureimid [German] Phthalamic acid, N-(2,6-dioxo-3-piperidyl)-, DL- o-Cgai