109-06-8
2-甲基吡啶
+
87-13-8
乙氧基甲叉丙二酸二乙酯
→
~82%
88612-71-9
ethyl 4-oxoquinolizine-3-carboxylate
101192-15-8
ethyl 3-ethoxy-2-ethoxycarbonyl-4-(pyridin-2-yl)butyrate