138-60-3
4-氧代-1,4-二氢-2,6-吡啶二甲酸
→
638128-19-5
ditert-butyl 4-chloropyridine-2,6-dicarboxylate
71022-75-8
4-氯-2,6-吡啶二羰基二氯
+
75-65-0
叔丁醇