6-(1,3-dioxolan-2-yl)-4-methylpyridin-3-amine

2-(1,3-dioxolan-2-yl)-5-(hydroxyamino)-4-methylpyridine

1H-吡咯并[2,3-c]吡啶-5-羧醛

1H-吡咯并[2,3-c]吡啶-5-羧酸

ethyl 5-formyl-1H-pyrrolo[2,3-c]pyridine-2-carboxylate