4-butoxypyridine-2,6-dicarbohydrazide

4-氯-2,6-吡啶二羰基二氯

diethyl 4-(10-bromodecoxy)pyridine-2,6-dicarboxylate

4-溴吡啶-2,6-二羧酰胺

Diethyl 4-hydroxy-2,6-pyridinedicarboxylate