Gravar-mail: The 2011 E. B. Hershberg Award for Important Discoveries in Medicinally Active Substances: (1S,3S)-3-Amino-4-difluoromethylenyl-1-cyclopentanoic acid (CPP-115), a GABA Aminotransferase Inactivator and New Treatment for Drug Addiction and Infantile Spasms()