[(4S,5S)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-hept-6-en-1-ynyl]-benzene 、 alkaline earth salt of/the/ methylsulfuric acid 生成 (5S,6S,6aR)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-3-phenyl-4,5,6,6a-tetrahydro-1H-pentalen-2-one 、 (5S,6S,6aS)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-3-phenyl-4,5,6,6a-tetrahydro-1H-pentalen-2-one