(3aR,4S,6aS)-4-(((tert-butyldiphenylsilyl)oxy)methyl)hexahydrospiro[cyclopenta[b]furan-5,2'-[1,3]dithiolan]-2-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