3-Methyl-2-[(E)-1-phenyl-ethylimino]-butyric acid methyl ester
(3R,6S)-3,6-Dihydro-3-(1-hydroxy-1-methylethyl)-6-isopropyl-2,5-dimethoxypyrazin
α-(2,4-dinitro-phenylhydrazono)-isovaleric acid methyl ester
3-Oxo-pentanoic acid 2,4,4-trimethyl-3-((E)-3-oxo-but-1-enyl)-cyclohex-2-enyl ester
(E)-(S)-6-Cyclohexyl-2-isopropyl-4-oxo-5-(trityl-amino)-hex-2-enoic acid methyl ester
methyl (S)-2-hydroxy-3-methylbutanoate
(R)-methyl 2-hydroxy-3-methylbutanoate