(2S)-3-(3,4-dimethoxyphenyl)-2-methylalanine, DL-3-(3,4-Dimethoxyphenyl)-2-methylalanine, (S)-2-amino-3-(3,4-dimethoxy-phenyl)-2-methyl-propionic acid, 3-methoxy-o,|A-dimethyl-l-tyrosine, (S)-2-Amino-2-<(3,4-dimethoxyphenyl)methyl>propansaeure, (S)-3-(3,4-dimethoxyphenyl)-2-methylalanine <L-methyldopa>, (S)-2-amino-3-(3,4-dimethoxyphenyl)-2-methylpropanoic acid