(1S-cis)-2,3,4,9-Tetrahydro-1,2-dimethyl-1H-pyrido(3,4-b)indole-3-carboxylic acid 1H-Pyrido(3,4-b)indole-3-carboxylic acid, 2,3,4,9-tetrahydro-1,2-dimethyl-, (1S-cis)- 54193-05-4