83730-53-4 BRN 2367136 Butanoic acid, 2-amino-4-(S-butylsulfonimidoyl)-, (2S)- Buthionine-S,R-sulfoximine, L- L-Buthionine (SR)-sulfoximine L-Buthionine sulfoximine L-Buthionine-(S,R)-sulfoximine L-Buthionine-(S,R)-sulphoximine NSC 326231