(2E,4R,5R,7R)-1-bromo-5,7-bis(tert-butyldimethylsiloxy)-2,4-dimethyl-2-octene

(2S,3S,5E,7R,8R,10R)-8,10-bis(tert-butyldimethylsilyloxy)-3,5,7-trimethylundec-5-en-1,2-diol