1,6-二氢-6-氧代-2-(3-吡啶)-5-嘧啶羧酸乙酯

4-氯-2-(吡啶-3-基)嘧啶-5-羧酸乙酯

5-phenyl-2-[2-(3-pyridyl)-1H-imidazol-4-yl]oxazole

烟酰胺

2-pyridin-3-yl-7H-purin-6-amine