(2)]. The enantiomers of 2 were separated either by using HPLC on optically active sorbent or by crystallization of the brucine salt of the phthalamic acid of 2. The absolute configuration of the (+)-and (-)-enantiomers of 2 were assigned as S and R, respectively, by comparing the CD spectra to those of the enantiomers of aminoglutethimide (AG, 3-(4-aminophenyl)-3- ethylpiperidine-2, 6-dione). The compounds were tested in vitro for inhibition of human ...