3-[({4-[(3E)-1-[4-cyclohexyl-3-(trifluoromethyl)phenyl]-3-aza-2-oxapent-3-en-4-yl]-2-ethylphenyl}methyl)amino]-2-[({[1-({4-[(3E)-1-[4-cyclohexyl-3-(trifluoromethyl)phenyl]-3-aza-2-oxapent-3-en-4-yl]-2-ethylphenyl}methyl)azetidin-3-yl]carbonyl}oxy)methyl]propanoic acid