(R*,S*)-(+-)-2-Amino-4-(S-butylsulfonimidoyl)butanoic acid 1-beta-DL-Buthionine(S,R)sulfoximine 97590-40-4 Butanoic acid, 2-amino-4-((R)-S-butylsulfonimidoyl)-, (2S)-rel- Butanoic acid, 2-amino-4-(S-butylsulfonimidoyl)-, (R*,S*)-(+-)- D,L-Buthionine-S,R-sulfoximine DL-Buthionine-(S,R)-sulfoximine