1-Methyl-9H-pyrido(3,4-b)indole-3-carboxylic acid methyl ester 16641-82-0 5-25-05-00117 (Beilstein Handbook Reference) 9H-Pyrido(3,4-b)indole-3-carboxylic acid, 1-methyl-, methyl ester BRN 0227256 S 437