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