4-[(2-((2R)-2-[(1E,3S)-4-(1,1'-biphenyl-3-yl)-3-hydroxybut-1-enyl]-5-oxopyrrolidin-1-yl)ethyl)sulfanyl]butanoic acid

butyl 4-((2-((R)-2-((S,E)-4-(3-ethylphenyl)-3-hydroxybut-1-en-1-yl)-5-oxopyrrolidin-1-yl)ethyl)thio)butanoate

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

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

4-([2-((2R)-2-((1E,3S)-4-[3-(1,3-dihydro-2H-isoindol-2-yl)phenyl]-3-hydroxybut-1-enyl)-5-oxopyrrolidin-1-yl)ethyl]sulfanyl)butanoic acid