4685-10-3
methyl 1-methylpyridin-1-ium-3-carboxylate,iodide
→
7164-65-0
1-methylpyridin-1-ium-3-carboxylic acid
59-67-6
烟酸
+
74-88-4
甲基碘
93-60-7
烟酸甲酯