2(S)-<5(R)-<1(S)-<(tert-butyloxycarbonyl)amino>-3-methylbutyl>-2,2-dimethyl-4(R)-dioxolanyl>-3-methylbutanol

3-<3-<3-(tert-butyloxycarbonyl)-2,2-dimethyl-4(S)-isobutyl-5(R)-oxazolidinyl>-2(R)-isopropyl-1,3-dioxopropyl>-4(R)-methyl-5(S)-phenyl-2-oxazolidinone

3(S)-<3-(tert-butyloxycarbonyl)-4(S)-isobutyl-2,2-dimethyl-5(R)-oxazolidinyl>-3-hydroxy-2(R)-isopropyl-propanoic acid