2175-91-9
6,6-二甲基-5-亚甲基-1,3-环戊二烯
+
5187-82-6
(乙氧基羰基甲基)二甲基溴化硫鎓
→
~91%
53018-37-4
ethyl 2,2-dimethylspiro[2.4]hepta-4,6-diene-1-carboxylate
7380-81-6
ethyl (dimethyl-λ4-sulfanylidene)acetate