methyl 4-((2-((R)-2-((S,E)-3-hydroxy-4-(m-tolyl)but-1-en-1-yl)-5-oxopyrrolidin-1-yl)ethyl)thio)butanoate

4-[(2-{(2R)-2-[(1E,3S)-3-hydroxy-4-(3-methylphenyl)but-1-enyl]-5-oxopyrrolidin-1-yl}ethyl)sulfanyl]butanoic acid

methyl 4-((2-((R)-2-((S,E)-3-hydroxy-4-(3-propylphenyl)but-1-en-1-yl)-5-oxopyrrolidin-1-yl)ethyl)thio)butanoate

methyl 4-((2-((R)-2-((S,E)-3-hydroxy-4-(3-(trifluoromethyl)phenyl)but-1-en-1-yl)-5-oxopyrrolidin-1-yl)ethyl)thio)butanoate

4-[(2-{(2R)-2-[(1E,3S)-3-hydroxy-4-(3-(2,2,2-trifluoroethoxymethyl)phenyl)but-1-enyl]-5-oxopyrrolidin-1-yl}ethyl)sulfanyl]butanoic acid