4a(R)-Acetoxy-1,3,6-tri-O-acetyl-2-azido-2,5-dideoxy-4a-carba-α-D-arabono-hexofuranose

(1R,5R,6R,7S,8R)-7-Azido-6,8-dihydroxy-2-oxabicyclo[3.3.0]octan-3-one

(1R,5R,7S,8S)-8-Acetoxy-7-bromo-2-oxabicyclo[3.3.0]oct-3-one

(1R,5R,8R)-8-Hydroxy-2-oxabicyclo[3.3.0]oct-6-en-3-one

(1R,5R,8R)-8-Acetoxy-2-oxabicyclo[3.3.0]oct-6-en-3-one