The chemical L-Penicillamine has a designated molecular formula of C5H11NO2S and a molecular weight of 149.208 g/mol. Synonyms may include: 4-04-00-03228 (Beilstein Handbook Reference), BRN 1722374, CCRIS 2902, EINECS 214-203-9, 3-Mercapto-L-valine, NSC 241261, UNII-NO1YIB7OIG (ChemID).