3,5-bis-trifluoromethyl-benzenesulfonic acid 9-(2-benzyloxy-ethyl)-8-(tert-butyl-dimethyl-silanyloxy)-3-(4-methoxy-benzyloxy)-2,3,4,7,8,9-hexahydro-oxonin-2-ylmethyl ester

(Z,2S,3R,8S,9S)-8-bromo-9-ethyl-3-hydroxy-2-((Z)-pent-2-en-4-ynyl)-2,3,4,7,8,9-hexahydrooxonine

6-[2-benzyloxy-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2,2-dimethyl-4a,6,9,10,11,11a-hexahydro-4H-1,3,5-trioxa-benzocyclononen-9-ol

6-(2-benzyloxy-1-hydroxy-ethyl)-2,2-dimethyl-4a,6,7,8,11,11a-hexahydro-4H-1,3,5-trioxa-benzocyclononen-7-ol

[2-benzyloxy-1-(12,12-dimethyl-2,5,11,13-tetraoxa-tricyclo[8.4.0.04,6]tetradec-7-en-3-yl)-ethoxy]-tert-butyl-dimethyl-silane