(R)-2-((S)-Hydroxy-phenyl-methyl)-butyric acid (1R,2S)-2-[(2-methyl-benzyl)-(2,4,6-trimethyl-benzyl)-amino]-1-phenyl-propyl ester

(2R,3R)-3-Hydroxy-2-methyl-octanoic acid (1R,2S)-2-[(2-methyl-benzyl)-(2,4,6-trimethyl-benzyl)-amino]-1-phenyl-propyl ester

(2R,3S)-4-Benzyloxy-3-hydroxy-2-methyl-butyric acid (1R,2S)-2-[(2-methyl-benzyl)-(2,4,6-trimethyl-benzyl)-amino]-1-phenyl-propyl ester

(2R,3R)-3-Cyclohexyl-3-hydroxy-2-methyl-propionic acid (1R,2S)-2-[(2-methyl-benzyl)-(2,4,6-trimethyl-benzyl)-amino]-1-phenyl-propyl ester

(R)-2-((S)-Hydroxy-phenyl-methyl)-hexanoic acid (1R,2S)-2-[(2-methyl-benzyl)-(2,4,6-trimethyl-benzyl)-amino]-1-phenyl-propyl ester