2-Amino-4-(S-butylsulfonimidoyl)butanoic acid 5072-26-4 71765-30-5 BRN 2367136 BUTHIONINE SULFOXIMINE Butanoic acid, 2-amino-4-(S-butylsulfonimidoyl)- Buthione sulfoximine Buthionine sulfoxamine Buthionine sulphoximine Buthionine-S,R-sulfoximine Butionine sulfoximine NSC 326231 NSC 381100 Sulfoximine, S-(3-amino-3-carboxypropyl)-S-butyl-