(2R,3R,4R,5S)-5-<(1S)-1,2-bis(benzoyloxy)ethyl>-2,3-(isopropylidenedioxy)-4-methyl-4-vinyltetrahydrofuran
(2R,3R,4R,5S)-5-<(1S)-2-(benzoyloxy)-1-hydroxyethyl>-2,3-(isopropylidenedioxy)-4-methyl-4-vinyltetrahydrofuran
(3aS,4S,6aR)-4-methoxy-tetrahydro-furo[3.4-b]furan-2(3H)-one
(3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl-(4-nitrophenyl)carbonic acid
(3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol