5-ethenylpyridin-2-amine

7-chloro-2-methylpyrido[1,2-a]pyrimidin-4-one

N-(5-氯-2-吡啶基)-3-氧代丁酰胺

[2,3-联吡啶]-6-胺

(2E)-5-Chloro-2-imino-1(2H)-pyridinol