Methyl (1S,5S,6R,7R)-7-Hydroxy-6-[3(R)-hydroxy-4-methyl-E-1-octen-6-ynyl]bicyclo[3.3.0]octane-E-Δ3,δ-pentanoate

1-dimethoxyphosphoryl-3-methylhept-5-yn-2-one

methyl 5-((3aS,5R,6R,6aS)-6-formyl-5-((tetrahydro-2H-pyran-2-yl)oxy)-1,3a,4,5,6,6a-hexahydropentalen-2-yl)pent-4-enoate

Methyl (1R,5S,6S,7R)-6-Hydroxymethyl-7-tetrahydropyranyloxybicyclo(3.3.0)oct-2-ene-3-γ-pentenoate

methyl (1R,5S,6S,7R)-6-tert-butyldimethylsilyloxymethyl-7-tetrahydropyranyloxybicyclo<3.3.0>oct-2-ene-3-γ-pentenoate