(4R,5R)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-octanedioic acid diethyl ester

Acetic acid (E)-(1S,4R,5R,8S,9R)-8-acetoxy-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-9-methoxymethoxy-1-((E)-(R)-1-methoxymethoxy-but-2-enyl)-dodec-10-enyl ester