(3aS,4R,6R,6aR)-4-{[tert-butyl(dimethyl)silyl]oxy}-3,3a,4,5,6,6a-hexahydro-6-hydroxy-6-methyl-2H-cyclopenta[b]furan-2-one

ethyl (1'R,4'S)-2-(4'-hydroxy-4'-phenylethynyl-2'-cyclopenten-1'-yl)-2-nitroacetate

Acetic acid (1S,4R)-4-(1-benzenesulfonyl-2-oxo-2-phenyl-ethyl)-1-phenylethynyl-cyclopent-2-enyl ester

(E)-4-{(1R,2S,4S)-2-[(E)-(S)-6-(tert-Butyl-dimethyl-silanyloxy)-hept-1-enyl]-4-methoxymethoxy-cyclopentyl}-4-hydroxy-but-2-enoic acid ethyl ester

{(1R,2R)-2-[(E)-(S)-6-(tert-Butyl-dimethyl-silanyloxy)-hept-1-enyl]-4-oxo-cyclopentyl}-acetonitrile