2-pyrrolidinone derivatives which have in position 4 at least one
substituent are described herein. Methods of treating polyglutamine
disorders such as Huntington's disease, dentorubropallidoluysian atrophy
(DRPLA), spinal and bulbar muscular atrophy (SBMA), and spinocerebellar
ataxias with 2-pyrrolidinone derivatives are also descibed.