74214-62-3 9H-Pyrido(3,4-b)indole-3-carboxylic acid, ethyl ester Ethyl 9H-pyrido(3,4-b)indole-3-carboxylate Ethyl beta-carboline-3-carboxylate Ro 15-2538 beta-CCE beta-Carboline-3-carboxylic acid ethyl ester