14C-Amb 2-Amino-2-methylbutanoic acid 2-Amino-2-methylbutyric acid 2-Ethylalanine 595-40-4 Alanine, 2-ethyl-, (L)- Butanoic acid, 2-amino-2-methyl- Butanoic acid, 2-amino-2-methyl-, (S)- Butyric acid, 2-amino-2-methyl- Isovaline Isovaline L- Isovaline, L- Isovaline, L- (8CI) NSC 1019 alpha-Amino-2-methylbutanoic acid alpha-Amino-alpha-methylbutyric acid alpha-Ethylalanine