1-[(2R,6R,8R,10S,13R)-10-(2-benzyloxy)ethyl-13-(tert-butyldimethylsilyloxy)-13-methyl-1,7,9-trioxadispiro[5.1.5.2]pentadec-2-yl]-2-propanone

(3E,12R,15S)-17-benzyloxy-12-(tert-butyldimethylsilyl)oxy-8,11-dioxo-12-methyl-15-(triethylsilyloxy)-3-heptadecen-2-one

1-{2-[(4R,7S)-9-benzyloxy-4-(tert-butyldimethylsilyl)oxy-4-methyl-3-oxo-7-(triethylsilyloxy)nonyl]-1,3-dithian-2-yl}-4-hepten-6-one

1-{2-[(3S,4R,7S)-9-benzyloxy-4-(tert-butyldimethylsilyl)oxy-3-hydroxy-4-methyl-7-(triethylsilyloxy)nonyl]-1,3-dithian-2-yl}-4-hepten-6-one

(Z)-(3S,7R)-9-Benzyloxy-3-(4-methoxy-benzyloxy)-7-triethylsilanyloxy-1-[2-(4-triethylsilanyloxy-butyl)-[1,3]dithian-2-yl]-non-5-en-4-one