1113-41-3 3-Mercapto-L-valine 4-04-00-03228 (Beilstein Handbook Reference) BRN 1722374 CCRIS 2902 EINECS 214-203-9 L-(+)-beta-Mercaptovaline L-Penicillamine L-Valine, 3-mercapto- (9CI) NSC 241261 Penicillamine L-form Valine, 3-mercapto-, L-