6-(oxan-2-yloxy)hex-4-yn-1-ol

3-(3,4-dihydro-2H-pyran-5-carbonyl)-2,6-dimethylpyran-4-one

6-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran

oxan-2-yl(triphenyl)phosphanium,bromide

2-diphenylphosphoryloxane