(7-acetyl-2,3-diphenylindolizin-1-yl) acetate

5-甲基-2,4'-联吡啶

2-pyridin-1-ium-1-yl-1-pyridin-4-ylethanone,iodide

2,4-二氧代-4-吡啶-4-丁酸甲酯

4-吡啶乙酸乙酯