2,2’-联吡啶-4,4’-二甲磷酸二乙酯

2,2’-联吡啶-4,4’-二甲酸乙酯

(2,5-dioxopyrrolidin-1-yl) 2-[4-(2,5-dioxopyrrolidin-1-yl)oxycarbonylpyridin-2-yl]pyridine-4-carboxylate