698-93-1
2,3-dipropylcycloprop-2-en-1-one
+
695-77-2
1,2,3,4-Tetrachloro-1,3-cyclopentadiene
→
5680-25-1
1,2,3,4-tetrachloro-5-(2,3-dipropylcycloprop-2-en-1-ylidene)cyclopenta-1,3-diene