(2S)-2-benzyloxy-4-oxo-pentyl 2,2-dimethylpropionate

(2S)-2-benzyloxy-6-hydroxy-4-oxo-7-[(2R,4R,6R)-(2-phenyl-6-triisopropylsilanyloxymethyl-[1,3]dioxan-4-yl)]heptyl 2,2-dimethylpropionate

(6S)-6-benzyloxy-4-hydroxy-6-oxo-7-[(2R,4S,6R)-(2-phenyl-6-triisopropylsilanyloxymethyl-[1,3]dioxan-4-yl)]hept-4-enyl-2,2-dimethylpropionate