(7S,8R,9S)-9-(tert-Butyl-diphenyl-silanyloxymethyl)-8-[(Z)-4-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-but-2-enyl]-1,4-dithia-spiro[4.4]nonan-7-ol

(Z)-5-((S)-4-Carboxymethyl-5-oxo-5,6,7,7a-tetrahydro-1H-inden-1-yl)-pent-3-enoic acid

6-[(6R,7R,8S)-7-((Z)-4-Carboxy-but-2-enyl)-8-hydroxy-1,4-dithia-spiro[4.4]non-6-yl]-4-oxo-hexanoic acid