Synonyms: 6,7-Dimethoxy-L-1,2,3,4-tetrahydroisoquinoline 3-carboxylic acid hydrochloride;3-Isoquinolinecarboxylicacid, 1,2,3,4-tetrahydro-6,7-dimethoxy-, hydrochloride, (3S)- (9CI);3-Isoquinolinecarboxylic acid, 1,2,3,4-tetrahydro-6,7-dimethoxy-,hydrochloride, (S)-;3-Isoquinolinecarboxylicacid, 1,2,3,4-tetrahydro-6,7-dimethoxy-, hydrochloride (1:1), (3S)-;(S)-6,7-Dimethoxy-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid hydrochloride;