for the following products
(2R 4S)-5-(4-biphenylyl)-2-methyl-4-({[(2-methyl-2-propanyl)oxy]carbonyl}amino)pentanoic acid | (2R,4S)-5-(Biphenyl-4-yl)-4-[(tert-butoxycarbonyl)amino]-2-methylpentanoic acid and (2R,4S)-5-([1,1'-Biphenyl]-4-yl)-4-((tert-butoxycarbonyl)amino)-2-methylpentanoic acid