(4R,5S)-3-((2R,3R)-3-Hydroxy-2,4-dimethyl-pent-4-enoyl)-4-methyl-5-phenyl-oxazolidin-2-one

(S)-4-Benzyl-3-[(2S,3R,4S,5R)-5-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-4,6-dimethyl-2-methylsulfanyl-hept-6-enoyl]-oxazolidin-2-one

(S)-4-Benzyl-3-[(3S,4S,5R)-3,5-bis-(tert-butyl-dimethyl-silanyloxy)-4,6-dimethyl-hept-6-enoyl]-oxazolidin-2-one

(S)-4-Benzyl-3-[(2S,3R,4R,5R)-3,5-bis-(tert-butyl-dimethyl-silanyloxy)-4,6-dimethyl-2-methylsulfanyl-hept-6-enoyl]-oxazolidin-2-one