(E)-4-[(2R,4R)-2-((S)-1-Methyl-2-oxo-ethyl)-6-oxo-tetrahydro-pyran-4-yl]-but-2-enoic acid tert-butyl ester

(S)-2-((2R,4S)-4-Allyl-6-oxo-tetrahydro-pyran-2-yl)-propionaldehyde

(4S,6R)-4-Allyl-6-((R)-2-hydroxy-1-methyl-ethyl)-tetrahydro-pyran-2-one

(S)-6-((R)-2-Benzyloxy-1-methyl-ethyl)-5,6-dihydro-pyran-2-one

(R)-6-((R)-2-Benzyloxy-1-methyl-ethyl)-5,6-dihydro-pyran-2-one