(2R,3R)-1,4-bis[(4S)-4-(methylethyl)-2-oxo(1,3-oxazolidin-3-yl)]-2,3-dimethylbutane-1,4-dione

2,2-Dimethyl-propionic acid (2R,3S)-4-{(R)-6-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-6-hydroxymethyl-2-[3-(4-methoxy-benzyloxy)-propyl]-5,6-dihydro-4H-pyran-3-yl}-2,3-dimethyl-butyl ester

2,2-Dimethyl-propionic acid (2R,3S)-4-[(R)-6-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-trifluoromethanesulfonyloxy-6-triisopropylsilanyloxymethyl-5,6-dihydro-4H-pyran-3-yl]-2,3-dimethyl-butyl ester

2,2-Dimethyl-propionic acid (2R,3R)-4-hydroxy-2,3-dimethyl-butyl ester

2,2-Dimethyl-propionic acid (2R,3R)-4-iodo-2,3-dimethyl-butyl ester