3-Carbomethoxy-beta-carboline 69954-48-9 9H-Pyrido(3,4-b)indole-3-carboxylic acid, methyl ester Methyl 9H-Pyrido(3,4-b)indole-3-carboxylate Methyl beta-carboline-3-carboxylate beta-CCM beta-Carboline-3-carboxylic acid methyl ester