[Teratogenic effect of N-phthaloyl-L-aspartic acid on the mouse (author's transl)]

The optical isomers of N-phthaloyl-aspartic acid, structurally related to thalidomide, were administered i.p. to pregnant mice on day 9 of gestation; the injected solutions contained Tween 20 as solubilizer. N-Phthaloyl-L-aspartic acid exerts an embryotoxic and teratogenic effect as is evident by the high incidence of resorption and malformations. On the other hand the D-isomer is devoid of any embryotoxic and teratogenic activity under the same conditions of experiment.