1-Methyl-2,3,4,9-tetrahydro-1H-beta-carboline-3-carboxylic acid1-Methyl-2,3,4,9-tetrahydro-1H-1-carboline-3-carboxylic acidNSC 262251-Methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid1,2,3,4-四氢哈尔满-3-羧酸1-甲基-1,2,3,4-四氢-β-咔啉-3-羧酸1,2,3,4-Tetrahydroharmane-3-carboxylic acid1-Methyl-1,2,3,4-Tetrahydropyrido[3,4-b]indole-3-carboxylic acid