Compounds particularly for use in an autoimmune inflammatory disease and especially the treatment of inflammatory bowel disease have the absolute stereochemistry and formula: In some cases R1 is leucine and R is selected from: OH, OCH3, OCH2CH3, OCH2CH2CH3, NH2, NHCH2CH2OH, NHCH3, N(CH3)2, NH(4-OH-3-benzoic acid).