.alpha.-Aminovaleric acid .alpha.-L-Aminopentanoic acid 2-Aminopentanoic acid 2-Aminovaleric acid 6600-40-4 L-Norvaline NSC203786 Norvaline Norvaline, L- Pentanoic acid, 2-amino- Pentanoic acid, 2-amino-, (S)- Valeric acid, 2-amino-