(2R,3R)-2-[(2R,3aS,6aR)-hexahydrofuro[b]furan-2-yl]-2,3-dimethylcyclohexanone

(6R,7R)-7-[(2R,3aS,6aR)-hexahydrofuro[2,3-b]furan-2-yl]-6,7-dimethyl-4,5,6,7-tetrahydrobenzo[d]isoxazole

(+/-)-2-methoxyhexahydrofuro[2,3-b]furan

(2R,3R,5R,2'R,3a'S,6a'R)-2-(hexahydrofuro[2,3-b]furan-2'-yl)-5-isopropenyl-2,3-dimethylcyclohexanone

(2R,3R)-2-[(2R,3aS,6aR)-hexahydrofuro[b]furan-2-yl]-2,3-dimethyl-5-cyclohexenone