1,5-naphthyridin-5-oxide 4-ol

2,2-dimethyl-5-((pyridin-3-ylamino)methylene)-1,3-dioxane-4,6-dione

3-carboxy-4-hydroxy-1,5-naphthyridine

3-氨基吡啶

2-((吡啶-3-基氨基)亚甲基)丙二酸二乙酯