(1S,3R,4R,5S,8S)-8-benzyloxy-7-keto-3,4-isopropylidenedioxy-2,6-dioxabicyclo[3.3.0]octane

(1S,4S,5R,8R)-4-acetamido--3-(tert-butyldimethylsilyloxy)-2,6-dioxabicyclo[3.3.0]octan-8-yl isovalerate

2,3-di-O-tert-butyldimethylsilyl-D-glucono-1,4-lactone

(1S,4S,5R,8R)-4-acetamido--8-benzyloxy-3-(tert-butyldimethylsilyloxy)-2,6-dioxabicyclo[3.3.0]octane

1,2-O-isopropylidene-5-O-benzyl-3-O-phenoxycarbonyl-α-D-glucofuranosiduronamide

vittarilide A

(1R,4R,5R,8R)-8-benzyloxy-3-methoxy-4-hydroxy-2,6-dioxabicyclo[3.3.0]octane

1,2-O-isopropylidene-β-D-idurono-3,6-lactone

(1S,4S,5R,8R)-4-acetamido--8-benzyloxy-3-methoxy-2,6-dioxabicyclo[3.3.0]octane

(1S,3R,4R,5S,8R)-8-benzyloxy-3,4-isopropylidenedioxy-2,6-dioxabicyclo[3.3.0]octane

(1S,4S,5R,8R)-4-azido--8-benzyloxy-3-methoxy-2,6-dioxabicyclo[3.3.0]octane

(3aR,5S,6S,6aR)-5-((R)-1-(benzyloxy)-2-((tert-butyldimethylsilyl)oxy)ethyl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-6-ol