(S)-6-((R)-2-Methoxymethoxy-propyl)-tetrahydro-pyran-2-one

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

((2R,4R,6R)-4-Hydroxy-2-methoxy-6-methyl-tetrahydro-pyran-2-yl)-acetic acid tert-butyl ester