(3RS,6R)-6-(hydroxymethyl)-3-(phenylselenyl)-3,4,5,6-tetrahydro-2H-pyran-2-one

(R)-6-<(E)-3-oxo-1-buten-1-yl>-5,6-dihydro-2H-pyran-2-one

(R)-6-Oxo-3,6-dihydro-2H-pyran-2-carbaldehyde

(R)-5-Azido-6-(tert-butyl-diphenyl-silanyloxy)-hexanoic acid 4-methoxy-benzyl ester

(R)-6-(tert-Butyl-diphenyl-silanyloxy)-5-methanesulfonyloxy-hexanoic acid 4-methoxy-benzyl ester