(S)-3-(1,3-Dihydro-1-oxo-2H-isoindol-2-yl)-2,6-piperidinedione 107657-57-8 2,6-Piperidinedione, 3-(1,3-dihydro-1-oxo-2H-isoindol-2-yl)-, (S)- EM 12, (s)- EM12, (S)- S(-)-EM 12