(3S,5S,6S)-3-(tert-Butyl-dimethyl-silanyloxy)-5-hydroxy-6-methyl-octanoic acid methyl ester

5-[3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yloxy]-3-(tert-butyl-dimethyl-silanyloxy)-6-methyl-octanoic acid 1-sec-butyl-3-(tert-butyl-dimethyl-silanyloxy)-4-carboxy-butyl ester