methyl 2-((2R,3S)-3-{[(4S)-4-benzyl-2-oxo-oxazolidin-3-yl]carbonyl}-2-hydroxyhex-5-ynyl)-4,6-dimethoxybenzoate

methyl 2-{(2R,3S)-3-{[(4S)-4-benzyl-2-oxo-oxazolidin-3-yl]carbonyl}-2-[(triisopropylsilyl)oxy]hex-5-ynyl}-4,6-dimethoxybenzoate

methyl 2-{(2R,3R)-3-(hydroxymethyl)-2-[(triisopropylsilyl)oxy]hex-5-ynyl}-4,6-dimethoxybenzoate

methyl 2,4-dimethoxy-6-{(2R,3R)-3-({[(4-methylphenyl)sulfonyl]oxy}methyl)-2-[(triisopropylsilyl)oxy]hex-5-ynyl}benzoate

methyl 2,4-dimethoxy-6-{(2R,3S)-3-methyl-2-[(triisopropylsilyl)oxy]hex-5-ynyl}benzoate