(2R)-3-cyclobutyl-2-[(3S,4S)-3-[[4-[3-[4-(1,1-difluoroethyl)-2-(trifluoromethyl)phenyl]propyl]piperidin-1-yl]methyl]-4-(3-fluorophenyl)pyrrolidin-1-yl]propanoic acid;(2S)-2-cyclohexyl-2-[(3S,4S)-3-[[4-hydroxy-4-(3-phenylpropyl)piperidin-1-yl]methyl]-4-phenylpyrrolidin-1-yl]acetic acid;(2R)-2-cyclohexyl-2-[(3S,4S)-3-[[4-hydroxy-4-(3-phenylpropyl)piperidin-1-yl]methyl]-4-phenylpyrrolidin-1-yl]acetic acid;(2R)-2-cyclohexyl-2-[(3S,4S)-3-[[4-hydroxy-4-[3-[4-(2H-tetrazol-5-yl)phenyl]propyl]piperidin-1-yl]methyl]-4-phenylpyrrolidin-1-yl]acetic acid