(2R,3S,4S)-5-benzyloxy-4-methyl-2,3-epoxypentanoic acid

(2S,3S,4S)-2-tert-Butoxycarbonylamino-3,5-dihydroxy-4-methyl-pentanoic acid methyl ester

((3S,4S,5S)-4-Hydroxy-5-methyl-2-oxo-tetrahydro-pyran-3-yl)-carbamic acid tert-butyl ester

(S)-1-[(2S,3S)-3-((S)-2-benzyloxy-1-methylethyl)oxiranyl]-3-(triisopropylsilyl)prop-2-yn-1-ol

(R)-1-[(2S,3S)-3-((S)-2-benzyloxy-1-methylethyl)oxiranyl]-3-(triisopropylsilyl)prop-2-yn-1-ol