D-dopa zwitterion L-dopa amino acid zwitterion L-dopa zwitterion 197.06881 L-dopa (2S)-2-ammonio-3-(3,4-dihydroxyphenyl)propanoate An amino acid zwitterion obtained from the transfer of a proton from the carboxy group to the amino group of L-dopa. Major microspecies at pH 7.3. 197.18790 (2S)-2-azaniumyl-3-(3,4-dihydroxyphenyl)propanoate [NH3+][C@@H](Cc1ccc(O)c(O)c1)C([O-])=O chebi_ontology WTDRDQBEARUVNC-LURJTMIESA-N Gmelin:487331 CHEBI:57504 C9H11NO4 InChI=1S/C9H11NO4/c10-6(9(13)14)3-5-1-2-7(11)8(12)4-5/h1-2,4,6,11-12H,3,10H2,(H,13,14)/t6-/m0/s1 0