S-butyl-DL-homocysteine (S,R)-sulfoximine(2RS)-2-amino-4-(S-butylsulfonimidoyl)butanoic acid(2RS)-2-amino-4-(S-butylsulfonimidoyl)butyric acidButhionine sulfoximineDL-butathionine-(S,R)-sulfoximineDL-buthionine sulfoximineS-butyl-DL-homocysteine-[S,R]-sulfoximinebuthionine sulfoximinebuthionine sulphoximine