82979-45-1
Methyl 2-chloro-2-cyclopropylideneacetate
+
513-81-5
2,3-二甲基-1,3-丁二烯
→
~2%
116084-42-5
methyl 5,6-dimethylspiro[2.5]octa-5,7-diene-8-carboxylate
116084-41-4
methyl 4-chloro-6,7-dimethylspiro[2.5]oct-6-ene-4-carboxylate