<1R,4S,5S,6R,8S>-3-ethoxy-4,6,8-trimethyl-2-aza-9-oxabicyclo<3,3,1>non-2-ene

methyl 2,3,4-trideoxy-2,4-C-dimethyl-α-D-lyxo-hexopyranoside

<1R,5R,6R,8S>-6,8-dimethyl-2-aza-9-oxabicyclo<3,3,1>nonan-3-one