(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

(4R,5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-4-hydroxy-5-methyl-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

(2R,3S,4R,5S)-[5-benzyloxymethyl-3-(dimethyl-phenyl-silanyl)-4-methyl-tetrahydro-furan-2-yl]-acetic acid methyl ester

(4R,5R,6R)-1-{6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-4-(tert-butyl-dimethyl-silanyloxy)-5-methyl-5,6-dihydro-4H-pyran-2-yl}-2-diazo-ethanone

[(2S,4S,5S,6S)-6-((1S,2S)-3-Benzyloxy-2-methoxy-1-methyl-propyl)-4-(tert-butyl-dimethyl-silanyloxy)-2-methoxy-5-methyl-tetrahydro-pyran-2-yl]-acetic acid methyl ester