(2S,6R)-2-{(2R,4R,6S)-4-(tert-Butyl-dimethyl-silanyloxy)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-tetrahydro-pyran-2-ylmethyl}-6-[2-(4-methoxy-benzyloxymethyl)-oxazol-4-yl]-[1,3]dioxan-4-one 、 alkaline earth salt of/the/ methylsulfuric acid 以82%的产率得到4-((2S,4R)-2-{(2R,4R,6S)-4-(tert-Butyl-dimethyl-silanyloxy)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-tetrahydro-pyran-2-ylmethyl}-6-methylene-[1,3]dioxan-4-yl)-2-(4-methoxy-benzyloxymethyl)-oxazole