1-Methylethyl 1-(3-pyridinyl)-9H-pyrido(3,4-b)indole-3-carboxylate 119377-13-8 9H-Pyrido(3,4-b)indole-3-carboxylic acid, 1-(3-pyridinyl)-, 1-methylethyl ester BRN 4267171 Isopropyl 1-(3-pyridinyl)-9H-pyrido(3,4-b)indole-3-carboxylate