(2S,4S,6S)-2-Ethyl-4-methyl-5-oxo-6-[(4S,5S,6S)-2,2,5-trimethyl-6-(2-oxo-ethyl)-[1,3]dioxan-4-yl]-heptanoic acid amide

(2S,4S,5S,6R)-6-[(4R,5S,6S)-6-(2-Benzyloxy-ethyl)-2,2,5-trimethyl-[1,3]dioxan-4-yl]-2-ethyl-5-hydroxy-4-methyl-heptanoic acid amide

(2S,4S,5S,6R)-2-Ethyl-5-hydroxy-6-[(4R,5S,6S)-6-(2-hydroxy-ethyl)-2,2,5-trimethyl-[1,3]dioxan-4-yl]-4-methyl-heptanoic acid amide