623-73-4
重氮乙酸乙酯
+
5437-33-2
3,5-二氯-2-吡啶酮
→
25177-50-8
ethyl 2-(3,5-dichloro-2-oxopyridin-1-yl)acetate
68057-84-1
(3,5-dichloro-[2]pyridyloxy)-acetic acid ethyl ester
142-08-5
2-羟基吡啶