N-[(2'-Cyano[1,1'-biphenyl]-4-yl)methyl]-L-valine methyl ester; Methyl ((2'-cyano-[1,1'-biphenyl]-4-yl)methyl)-L-valinate; (S)-Methyl 2-(((2'-cyano-[1,1'-biphenyl]-4-yl)methyl)amino)-3-methylbutanoate ;