(1R,3S,4R,5R)-3-[(E/Z)-1-benzyloxymethyl-3-hydroxy-1-propenyl]-4-methyl-7,7-dimethyl-2,6,8-trioxabicyclo[3.3.0]octane

(3R,4S,5R)-5-benzyloxymethyl-4-(tert-butyldimethylsilyl)oxy-3-methyl-5-vinyl-2-pyrrolidinone

(1R,3S,4R,5R)-3-[(E/Z)-1-benzyloxymethyl-2-ethoxycarbonylethenyl]-4-methyl-7,7-dimethyl-2,6,8-trioxabicyclo[3.3.0]octane

(2R,3S,4R)-2-((benzyloxy)methyl)-5-hydroxy-4-methyl-1-(2,2,2-trichloroacetyl)-2-vinylpyrrolidin-3-yl formate

2,2,2-Trichloro-acetimidic acid (E)-4-benzyloxy-3-((3aR,5S,6R,6aR)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-but-2-enyl ester