(2,4-dimethyl-8-oxabicyclo[3.2.1]oct-2-en-3-yl)oxy-trimethylsilane 、 alkaline earth salt of/the/ methylsulfuric acid 生成 2,7-dimethyl-3,6-epoxy-2-(1-ethoxy-2-propyn-1-yl)cycloheptan-1-one 、
(1S,2R,4S,5R)-2-[(1S)-1-ethoxyprop-2-ynyl]-2,4-dimethyl-8-oxabicyclo[3.2.1]octan-3-one 、 2,7-dimethyl-3,6-epoxy-2-(1-ethoxy-2-propyn-1-yl)cycloheptan-1-one 、 2,7-dimethyl-3,6-epoxy-2-(1-ethoxy-2-propyn-1-yl)cycloheptan-1-one