(4R,5'S)-2-(5'-hydroxy-1'-oxoheptyl)-4-pentanolide tetrahydropyranyl-2 ether

(R)-3-(tetrahydropyran-2-yloxy)-1-(toluene-p-sulfonyloxy)pentane

(S)-1,3-pentanediol 3-(R)-α-methoxy-α-trifluoromethylphenylacetate