1-Oxo-1,2,3,4-tetrahydro-9H-pyrido(3,4-b)indole-8-acetic acid 1-Oxo-8-carboxymethyl-1,2,3,4-tetrahydro-beta-carboline 66859-83-4 9H-Pyrido(3,4-b)indole-8-acetic acid, 1,2,3,4-tetrahydro-1-oxo-