({(1R,2S)-2-(benzyloxy)-2-[(2R,6S)-6-ethoxy-5,6-dihydro-2H-pyran-2-yl]-1-phenylethyl}oxy)(tert-butyl)diphenylsilane

(6R)-6-[(1S,2R)-1-(benzyloxy)-2-{[tert-butyl(diphenyl)silyl]oxy}-2-phenylethyl]-3,6-dihydro-2H-pyran-2-one

(6R)-6-[(1S,2R)-1-(benzyloxy)-2-{[tert-butyl(diphenyl)silyl]oxy}-2-phenylethyl]-5,6-dihydro-2H-pyran-2-one

(R)-6-((4S,5R)-2-Oxo-5-phenyl-[1,3]dioxolan-4-yl)-5,6-dihydro-pyran-2-one

(R)-6-((4S,5R)-2-Oxo-5-phenyl-[1,3]dioxolan-4-yl)-3,6-dihydro-pyran-2-one