1-Methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid 1-Methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid, sodium nitrite treated 1-Methyl-tetrahydro-beta-carboline-3-carboxylic acid 1H-Pyrido(3,4-b)indole-3-carboxylic acid, 2,3,4,9-tetrahydro-1-methyl- 5470-37-1 CCRIS 6487 Harmane 1,2,3,4 tetrahydro-3-carboxylic acid NSC 26225 Tetrahydroharman-3-carboxylic acid