methyl (2R,3R)-4-(tert-butyldiphenylsilyl)oxy-3-hydroxy-2-(4-methoxybenzyl)oxybutanoate

(5R,8R,9S)-8-tert-butyldiphenylsiloxymethyl-2-hydroxy-9-methoxycarbonyl-2-methyl-9-trimethylsiloxy-1,7-dioxaspiro[4.4]nonan-6-one

(2R,3S,4R)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-4-hydroxy-5-oxo-4-(3-oxo-butyl)-3-trimethylsilanyloxy-tetrahydro-furan-3-carboxylic acid methyl ester

(5R,8R,9S,1'S)-8,9-O-(4'-methoxybenzylidene)-9-methoxycarbonyl-1,7-dioxaspiro[4.4]non-3-ene-2,6-dione

(5R,8R,9S)-8-tert-butyldiphenylsiloxymethyl-9-methoxycarbonyl-9-trimethylsiloxy-1,7-dioxaspiro[4.4]non-3-ene-2,6-dione

(1S,3S,4S,5R)-1-((R,E)-3,5-dimethyl-6-phenylhex-3-en-1-yl)-4-hydroxy-4,5-bis(methoxycarbonyl)-2,8-dioxabicyclo[3.2.1]octane-3-carboxylic acid

(5R,8R,9S)-8-(tert-butyldiphenylsiloxymethyl)-9-hydroxy-9-methoxycarbonyl-1,7-dioxaspiro[4.4]non-3-ene-2,6-dione

methyl (R)-4-(tert-butyldiphenylsilyl)oxy-3-[3-(methoxymethoxy)propionyl]oxy-2-oxobutanoate

methyl (3R)-4-tert-butyldiphenylsiloxy-3-(5-phenylthio-2-furoyloxy)-2-oxobutanoate

(5R,8R,9S)-8-tert-butyldiphenylsiloxymethyl-9-methoxycarbonyl-9-trimethylsiloxy-1,7-dioxaspiro[4.4]nonane-2,6-dione

methyl (2R,3R)-4-(tert-butyldiphenylsilyl)oxy-2-hydroxy-3-[3-(methoxymethoxy)propionyl]oxybutanoate

(1S,3R,4S,5R)-1-[(3E,5R)-3,5-dimethyl-6-phenyl-3-hexenyl]-4-hydroxy-3-hydroxymethyl-4,5-bis(methoxycarbonyl)-2,8-dioxabicyclo[3.2.1]octane