(2S,4R)-2-butyl-4-[[(2S)-3,3-dimethyl-1-methylamino-1-oxobutan-2-yl]carbamoyl]-6-[4-(4-fluorophenyl)phenyl]hexanoic acid
(2S,4R)-2-butyl-4-[[(1S)-2,2-dimethyl-1-(methylcarbamoyl)propyl]carbamoyl]-6-[4-(4-fluorophenyl)phenyl]hexanoic acid
(2S,4R)-2-butyl-4-[[[(1S)-2,2-dimethyl-1-(methylcarbamoyl)propyl]amino]-oxomethyl]-6-[4-(4-fluorophenyl)phenyl]hexanoic acid
(2S,4R)-2-butyl-4-[[(2S)-3,3-dimethyl-1-methylamino-1-oxo-butan-2-yl]carbamoyl]-6-[4-(4-fluorophenyl)phenyl]hexanoic acid