(R)-5-Methoxymethoxy-3-oxo-hexanoic acid tert-butyl ester

(R)-3-Hydroxy-5-methoxymethoxy-hexanoic acid tert-butyl ester

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

(R)-9-Methyl-8-oxa-1,4-dithia-spiro[4.5]decan-7-one

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