1,2,3,4-Tetrahydroisoquinoline carboxylic acid (CAS NO.41034-52-0), its Synonyms are 1-Isoquinolinecarboxylic acid, 1,2,3,4-tetrahydro- ; L-Tetrahydro-3-isoquinoline carboxylic acid ; THIQC ; Tetrahydroisoquinoline carboxylic acid .