ethyl 3-(4-azanylphenyl)-2-(1,3-dioxoisoindol-2-yl)propanoate, 4-amino-N,N-phthaloyl-L-phenylalanin-ethyl ester, 3-(4-aminophenyl)-2-(1,3-diketoisoindolin-2-yl)propionic acid ethyl ester, (L)-ethyl 3-(4-aminophenyl)-2-(1,3-dioxoisoindolin-2-yl)propanoate, 4-Amino-N,N-phthaloyl-L-phenylalanin-aethylester,