(R)-3-(1,3-Dihydro-1-oxo-2H-isoindol-2-yl)-2,6-piperidinedione 107740-48-7 2,6-Piperidinedione, 3-(1,3-dihydro-1-oxo-2H-isoindol-2-yl)-, (R)- EM 12, (r)- R(+)-EM 12