3-(tert-butyloxycarbonyl)-5(S)-formyl-2,2-dimethyl-4(S)-(2-methylpropyl)oxazolidine

1(R)-<3-(tert-butyloxycarbonyl)-2,2-dimethyl-4(S)-isobutyl-5(R)-oxazolidinyl>-2(S)-isopropyl-1,3-propanediol

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

(5R)-formyl-(4S)-isobutyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

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