1-[4-[tert-butyl(dimethyl)silyl]oxy-5,5,8,8-tetramethoxy-1,2,3,4-tetrahydronaphthalen-2-yl]ethanol 、 alkaline earth salt of/the/ methylsulfuric acid 生成 8-(tert-Butyl-dimethyl-silanyloxy)-4,4-dimethoxy-6-(1-trimethylsilanyloxy-ethyl)-5,6,7,8-tetrahydro-4H-naphthalen-1-one 、
5-(tert-Butyl-dimethyl-silanyloxy)-4,4-dimethoxy-7-(1-trimethylsilanyloxy-ethyl)-5,6,7,8-tetrahydro-4H-naphthalen-1-one