7,7-dichlorobicyclo[4.1.0]hept-4-ene

2,2-dimethyl-5-propyl-1,3-dioxane-4,6-dione

2-溴戊酸

4,4-dichloro-cis-transoid-cis-8-oxatricyclo<5,1,0,0>octane

sodium,butane