6-deoxy-1,2:3,5-di-O-isopropylidene-α-D-xylo-hex-5-enofuranose

1,2:5,6-di-O-isopropylidene-β-D-arabino-hexofuranos-3-ulose

1,2:3,5-di-O-isopropylidene-β-L-idofuranoside

1,2:5,6-di-O-isopropylidene-α-D-allofuranose