3-吡啶-4-基-1,2,4-噁二唑-5-羧酸乙酯

3-吡啶-3-基-1H-吡唑-5-胺

3-吡啶-3-基-4H-1,2,4噁二唑-5-酮

(2-methyl-1H-indol-3-yl)-pyridin-3-ylmethanone

3-丁酰基吡啶