(+/-)-2-ethenyl-5,5-(ethylenedioxy)-7-oxabicyclo<2.2.1>hept-2-ene

(+/-)-2-bromo-6,6-(ethylenedioxy)-7-oxabicyclo<2.2.1>hept-2-ene

(1R,4R,5S,6R)-6-Benzoyl-5-hydroxy-7-oxa-bicyclo[2.2.1]heptan-2-one

(1R,2R,5R,6R,7R)-4,5-Diphenyl-3,10-dioxa-4-aza-tricyclo[5.2.1.02,6]decan-9-one

Acetic acid (1R,2S,4R,5S,6R)-6-benzoyl-2-cyano-5-hydroxy-7-oxa-bicyclo[2.2.1]hept-2-yl ester