5-[1-(cyclopropylmethyl)pyridin-1-ium-4-yl]-3-methyl-1,2-oxazole,bromide

3-methyl-5-(1-propylpyridin-1-ium-4-yl)-1,2-oxazole,bromide

3-methyl-5-(1-prop-2-enylpyridin-1-ium-4-yl)-1,2-oxazole,chloride

异烟酸

丙酮