6-{(4S,4aR,5R,6R,7aS)-6-(tert-Butyl-dimethyl-silanyloxy)-5-[(E)-(S)-3-(tert-butyl-dimethyl-silanyloxy)-oct-1-enyl]-2,2-dimethyl-hexahydro-cyclopenta[1,3]dioxin-4-yl}-hex-5-ynoic acid methyl ester

6-[(4S,4aR,5R,6R,7aS)-6-Acetoxy-5-((E)-(S)-3-acetoxy-oct-1-enyl)-2,2-dimethyl-hexahydro-cyclopenta[1,3]dioxin-4-yl]-hex-5-ynoic acid methyl ester

(7S)-11,15-O-Bis(tert-butyldimethylsilyl)-5,6-didehydro-7-hydroxy-PGE2 methyl ester