1-((3,4-Dihydroxyphenyl)methyl)-1,2,3,4-tetrahydro-6,7-dihydroxy-1-isoquinolinecarboxylic acid 1-Isoquinolinecarboxylic acid, 1-((3,4-dihydroxyphenyl)methyl)-1,2,3,4-tetrahydro-6,7-dihydroxy- 65427-91-0 NLCA Norlaudanosoline-1-carboxylic acid Norlaudanosolinecarboxylic acid