ethyl 1,2-dihydro-2-oxo-4-chloro-6-methylpyridine-3-carboxylate

3-Pyridinecarbonyl chloride, 2,4-dichloro-6-methyl-

6-甲基-4-氧代-1,4-二氢吡啶-3-羧酸

ethyl 4-hydroxy-6-methyl-5-nitro-2-oxo-1H-pyridine-3-carboxylate

6-甲基烟酸乙酯