(E)-Dodec-3-en-8-yne-2,7-dione 2-(O-benzyl-oxime)

lithium,pent-1-yne

1-((tert-butyldimethylsilyl)oxy)non-5-yn-4-ol

4-((tetrahydro-2H-pyran-2-yl)oxy)non-5-yn-1-ol

4-(Tetrahydro-pyran-2-yloxy)-non-5-ynal