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
(6S)-7-Cyclohexyl-2-methyl-6-(N-triphenylmethyl)-amino-5-oxohept-2-ene-3-oic acid
(S)-6-Cyclohexyl-2-isopropylidene-4-oxo-5-(trityl-amino)-hexanoic acid 2,5-dioxo-pyrrolidin-1-yl ester
(S)-6-Cyclohexylmethyl-3-isopropylidene-piperidine-2,5-dione
(3S,5S,6S)-6-Cyclohexylmethyl-5-hydroxy-3-isopropylpiperidin-2-one
(5S,6S)-6-Cyclohexylmethyl-3-isopropylidene-5-hydroxypiperidine-2-one