(E)-5-[(3aS,4R,5R,6aS)-5-(tert-Butyl-dimethyl-silanyloxy)-4-[(E)-(S)-3-(tert-butyl-dimethyl-silanyloxy)-4-methyl-oct-1-en-6-ynyl]-hexahydro-pentalen-(2E)-ylidene]-pent-3-enoic acid methyl ester

(Z)-5-[(3aS,4S,5R,6aS)-4-Hydroxymethyl-5-(tetrahydro-pyran-2-yloxy)-octahydro-pentalen-2-yl]-pent-4-enoic acid methyl ester

5-[(3aS,5R,6R,6aS)-6-Formyl-5-(tetrahydro-pyran-2-yloxy)-1,3a,4,5,6,6a-hexahydro-pentalen-2-yl]-pentanoic acid methyl ester