110-00-9
呋喃
+
762-21-0
丁炔二酸二乙酯
→
~71%
24736-85-4
diethyl 7-oxabicyclo[2.2.1]hepta-2,5-diene-2,3-dicarboxylate
116308-60-2
diethyl (Z)-2-(morpholino)-2-butenedioate
1350638-36-6
diethyl (Z)-2-(piperidine-1-yl)-2-butenedioate