2-Aminopentanoic acid 2-Aminovaleric acid 6600-40-4 EINECS 229-543-3 L-Norvaline (9CI) NSC 203786 Norvaline Norvaline (VAN) Norvaline, L- Pentanoic acid, 2-amino- Pentanoic acid, 2-amino-, (S)- Valeric acid, 2-amino- alpha-L-Aminopentanoic acid