((5-甲基-2-吡啶氨基)亚甲基)丙二酸二乙酯

2-chloro-5-methyl-1-oxidopyridin-1-ium

6'-溴-5-甲基-2,2'-联吡啶

6-乙酰氨基烟酸甲酯

2-疏基-5-甲基吡啶