(4S,4aS,5S,6S,7aS)-6-Ethyl-4-((S)-1-hydroxy-allyl)-2,2,4a,5-tetramethyl-tetrahydro-furo[2,3-d][1,3]dioxin-5-ol

(4R,4aS,5S,6S,7aS)-4-(2-Benzyloxy-ethyl)-6-ethyl-2,2,4a,5-tetramethyl-tetrahydro-furo[2,3-d][1,3]dioxin-5-ol

(4R,4aS,5S,6S,7aS)-6-Ethyl-2,2,4a,5-tetramethyl-4-vinyl-tetrahydro-furo[2,3-d][1,3]dioxin-5-ol

(2S,3R,4R)-2-(2-Benzyloxy-ethyl)-4,5-dihydroxy-3,4-dimethyl-tetrahydro-furan-3-carbaldehyde

(4R,4aS,5S,6S,7aS)-6-Ethyl-2,2,4a,5-tetramethyl-4-[2-(2-nitro-phenylselanyl)-ethyl]-tetrahydro-furo[2,3-d][1,3]dioxin-5-ol

(1S,5R,6R)-6-(2-Benzyloxy-ethyl)-4,5-dimethyl-2,7-dioxa-bicyclo[3.2.0]hept-3-ene

(4R,4aS,5S,6S,7aS)-6-Ethyl-4-(2-hydroxy-ethyl)-2,2,4a,5-tetramethyl-tetrahydro-furo[2,3-d][1,3]dioxin-5-ol

3-Chloro-benzoic acid (1R,3R,4S,5S,6R)-6-(2-benzyloxy-ethyl)-4-hydroxy-4,5-dimethyl-2,7-dioxa-bicyclo[3.2.0]hept-3-yl ester