(S)-4-((2S,3S,4R,5R)-3,4-Dihydroxy-5-methoxy-2-methyl-tetrahydro-furan-2-ylmethylsulfanyl)-2-(2,2,2-trifluoro-acetylamino)-butyric acid methyl ester

(3aS,4S,6R,6aR)-6-Methoxy-2,2,4-trimethyl-tetrahydro-furo[3,4-d][1,3]dioxole-4-carboxylic acid methyl ester