1H-indole-2-carboxylic acid, ethyl ester 3770-50-1 InChI=1/C11H11NO2/c1-2-14-11(13)10-7-8-5-3-4-6-9(8)12-10/h3-7,12H,2H2,1H ethyl 1H-indole-2-carboxylate