(2S,3S,8R,9R)-acetic acid 9-ethyl-2-((2S,3S)-3-hydroxymethyl-oxiranylmethyl)-8-triethylsilanyloxy-2,3,4,7,8,9-hexahydro-oxonin-3-yl ester

(1S,2S,4E)-acetic acid 1-allyl-6-benzyloxy-2-((1R,2R)-2-benzyloxy-1-ethyl-pent-4-enyloxy)-hex-4-enyl ester

(1S)-acetic acid 1-[(1S)-((1R,2R)-1-ethyl-2-triethylsilanyloxy-pent-4-enyloxy)-2-((2S,3S)-3-hydroxymethyl-oxiranyl)-ethyl]-but-3-enyl ester

(1S,2S,4E)-acetic acid 1-allyl-2-((1R,2R)-1-ethyl-2-triethylsilanyloxy-pent-4-enyloxy)-6-triethylsilanyloxy-hex-4-enyl ester

2,4,6-triisopropyl-benzenesulfonic acid (1R)-1-((2R,3aS,5R,6R,10aS)-5-ethyl-6-triethylsilanyloxy-2,3,3a,5,6,7,10,10a-octahydro-furo[3,2-b]oxonin-2-yl)-prop-2-ynyl ester