Methyl 4-[1-{4-[2-(tert-butoxy)-1,1-difluoro-2-oxoethoxy]benzyl}-1-{4-[[di(tert-butoxy)phosphoryl](difluoro)methyl]benzyl}-2-(4-fluorophenyl)-2-oxoethyl]benzoate (HCID 18510258)|Huagongshe