2S,4S,5S-2-(N-benzyloxycarbonyl)amino-6-O-tert-butyldimethylsilyl-5,6-dihydroxy-hexan-4-olide

4S,5S-2-(N-benzyloxycarbonyl)amino-5,6-dihydroxy-6-O-tert-butyldimethylsilyl-hex-2-en-4-olide

4S,5S-2-(N-benzyloxycarbonyl)amino-5,6-dihydroxy-6-O-methanesulphonyl-hex-2-en-4-olide

(R)-2-[(2R,4S,5S,6R)-6-(Bis-ethylsulfanyl-methyl)-5-hydroxy-2-(4-methoxy-phenyl)-[1,3]dioxan-4-yl]-2-hydroxy-N-methyl-acetamide

Benzoic acid (1S,2R)-1-((1R,2R)-1-benzyloxy-2-hydroxy-2-methylcarbamoyl-ethyl)-3,3-bis-ethylsulfanyl-2-(4-methoxy-benzyloxy)-propyl ester