10374-07-9
3-oxabicyclo[3.2.0]hept-6-ene-2,4-dione
→
22980-23-0
3-oxabicyclo[2.2.0]hex-5-en-2-one
+
504-31-4
2H-吡喃-2-酮
1120-53-2
1,3-环状丁二烯
39763-18-3
5-oxopenta-2,4-dienal