methyl 4-({2-[(2R)-2-{(1E)-4-[3-(methoxymethyl)phenyl]-3-oxo-1-buten-1-yl}-5-oxo-1-pyrrolidinyl]ethyl}thio)butanoate

2-[(2R)-2-({tert-butyldimethylsilyloxy}methyl)-5-oxo-1-pyrrolidinyl]ethyl methanesulfonate

9-oxo-13-hydroxy-14,15,16,17,18,19,20-heptanor-5-thia-8-azaprostanoic acid methyl ester

9-oxo-12-formyl-13,14,15,16,17,18,19,20-octanor-5-thia-8-azaprostanoic acid methyl ester

S-(2-{(2R)-2-[(tert-butyldimethylsilyloxy)methyl]-5-oxo-1-pyrrolidinyl}ethyl)ethanethioate