1H-Pyrrolo[2,3-b]pyridine-1-carboxylic acid, 3-formyl-, 1,1-dimethylethyl ester
1,1-Dimethylethyl 3-formyl-1H-pyrrolo[2,3-b]pyridine-1-carboxylate
1-(tert-Butyloxycarbonyl)-3-formyl-7-azaindole
3-Formyl-1H-pyrrolo[2,3-b]pyridine-1-carboxylic acid tert-butyl ester