异烟酸

propan-2-yl pyridine-4-carboxylate

4-isopropyloxycarbonyl-1-methylpyridinium iodide

methyl 1-methylpyridin-1-ium-4-carboxylate,iodide

1-甲基-2-氧代-1,2-二氢吡啶-4-羧酸