(4S,1'E,3'S)-4-[3'-{tert-butyldimethylsilyl}oxy]-1'-octenyl-2-cyclopenten-1-one

(R)-7-{(1S,2S)-2-[(E)-(S)-3-(tert-Butyl-dimethyl-silanyloxy)-oct-1-enyl]-5-oxo-cyclopent-3-enyl}-7-hydroxy-heptanoic acid methyl ester

(S)-7-{(1S,2S)-2-[(E)-(S)-3-(tert-Butyl-dimethyl-silanyloxy)-oct-1-enyl]-5-oxo-cyclopent-3-enyl}-7-hydroxy-heptanoic acid methyl ester

(S)-7-{(1S,2S)-2-[(E)-(S)-3-(tert-Butyl-dimethyl-silanyloxy)-oct-1-enyl]-5-oxo-cyclopent-3-enyl}-7-methanesulfonyloxy-heptanoic acid methyl ester

(R)-7-{(1S,2S)-2-[(E)-(S)-3-(tert-Butyl-dimethyl-silanyloxy)-oct-1-enyl]-5-oxo-cyclopent-3-enyl}-7-methanesulfonyloxy-heptanoic acid methyl ester