723339-43-3
lithium (1Z)-4-ethoxy-3,4-dioxo-1-pyridin-4-ylbut-1-en-1-olate
→
~91%
19959-81-0
ethyl 3-pyridin-4-yl-1H-pyrazole-5-carboxylate
60943-41-1
ethyl 2,4-dioxo-4-(4-pyridinyl)butanoate
197775-45-4
5-(4-嘧啶)-1H-吡唑-3-羧酸