((2S,6S)-2-Methoxy-6-methyl-4-oxo-tetrahydro-pyran-2-yl)-acetic acid tert-butyl ester

{(2R,6R)-6-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-propyl]-2-methoxy-4-oxo-tetrahydro-pyran-2-yl}-acetic acid tert-butyl ester

{(2R,4R,6S)-6-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-propyl]-4-hydroxy-2-methoxy-tetrahydro-pyran-2-yl}-acetic acid tert-butyl ester

(S)-10-((2S,4S)-2,4-Dihydroxy-pentyl)-9-oxa-1,5-dithia-spiro[5.5]undecan-8-one

(R)-10-((4R,6R)-2,2,6-Trimethyl-[1,3]dioxan-4-ylmethyl)-9-oxa-1,5-dithia-spiro[5.5]undecan-8-one

(R)-10-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-propyl]-9-oxa-1,5-dithia-spiro[5.5]undecan-8-one

{(8S,10R)-10-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-propyl]-8-hydroxy-9-oxa-1,5-dithia-spiro[5.5]undec-8-yl}-acetic acid tert-butyl ester

(R)-10-((R)-2-Hydroxy-propyl)-9-oxa-1,5-dithia-spiro[5.5]undecan-8-one

(R)-4-Hydroxy-6-((R)-2-hydroxy-propyl)-tetrahydro-pyran-2-one