1-(4-吗啉基)-2-(4-吡啶基)乙硫酮

4-ethyl-2-(4-ethylpyridin-2-yl)pyridine

4,4',4''-triethyl-2,2':6',2''-terpyridine

(1-吡啶-4-基乙亚基氨基)硫脲

奎宁环