2,6-吡啶二羧酸二乙酯

ethyl 6-(acetyloxymethyl)pyridine-2-carboxylate

吡啶-2.6-二羧酸二甲酯

6-carboxy-2-pyridylmethyl α-(N-acetylamino)cinnamate

2-(ethoxycarbonyl)-6-methylpyridine 1-oxide