6,6-Dimethyl-5,8-bis-triethylsilanyloxy-oct-1-ene

{2-[(1R,2S,3R,4S)-3-(tert-Butyl-dimethyl-silanyloxy)-4-methyl-1-trimethylsilanyloxy-2-vinyl-cyclopentyl]-1-methyl-2-oxo-ethyl}-phosphonic acid diethyl ester

(E)-(4S,5R)-5-(tert-Butyl-dimethyl-silanyloxy)-4-methyl-2-oxo-oct-6-enoic acid methyl ester