1,2,3,4-Tetrahydro-8-carboxy-2,2-dimethyl-5H-pyrido(4,3-b)indolium iodide ethylester 40431-46-7 5H-Pyrido(4,3-b)indolium, 1,2,3,4-tetrahydro-8-carboxy-2,2-dimethyl-, iodide, ethyl ester